Their

Target opponent gains control of target creature you control.

Acquired

There

Exile target creature you control, then return it to the battlefield under its owner's control.

There // They're // Their

Kozilek, Compleated

({C/P} can be paid with either {C} or 2 life.)
When you cast this spell, each opponent gets two poison counters, then each opponent with more than two cards in hand discards cards equal to the difference.
Annihinfect (Whenever this creature attacks, defending player sacrifices a permanent for each poison counter they have.)

Microscope

{T}: Surveil 1.
{T}: Target permanent card in a graveyard becomes a 0/0 black Germ creature in addition to its other colors and types until end of turn. (This effect ends if it leaves the graveyard.)

Runed Terror

Instead of taking turns as normal, players take their phases sequentially. (For example, you take your beginning phase as the active player, then the next player in turn order becomes the active player and takes their beginning phase. After each player had a beginning phase, do the same for first main, combat phase, second main, ending phase, and then beginning phase again. If this creature leaves the battlefield, the active player continues their turn as normal.)

Planequake

Planequake deals X damage to each creature without flying and each planeswalker. If X is 10 or more, open the "Uncovered Cavern" plot booster.

Scaled Destruction

Choose one or more —
• Destroy all small creatures.
• Destroy all medium creatures.
• Destroy all large creatures.
(A small creature has total power and toughness 4 or less, medium is 5—8, and large is 9 or more.)

Common Black Removal

Choose one. Destroy target creature, then —
• Create a Food token.
• Create a Treasure token.
• Put a menace counter on a creature you control.
• That creature's controller mills cards equal to its power.

Pick Your Poison

Choose any number of modes that total exactly 4. You may choose the same mode more than once.
[1] Put a +1/+1 counter on target creature.
[2] Create a 1/1 black Snake creature token with deathtouch.
[4] All creatures get -2/-2 until end of turn.

Slumbering Waterways

Slumbering Waterways enters the battlefield tapped.
{T}: Add {G} or {U}.
Flying, vigilance, trample

Dwarven Confluencer

{T}: Destroy target nontoken land. Its controller creates a Mana Confluence token. (It's a land with "{T}, Pay 1 life: Add one mana of any color.")

Who's That Praetor?

Choose one at random. Create a token that's a copy of the chosen card.
• Elesh Norn, Mother of Machines
• Jin-Gitaxias, Progress Tyrant
• Sheoldred, the Apocalypse
• Urabrask, Heretic Praetor
• Vorinclex, Monstrous Raider
• Ebon Praetor

Red Herring

{1}{U}: Exchange Red Herring from your hand with a permanent you control on the battlefield or a spell you control on the stack. If that permanent or spell was the target of a spell or ability, change that target to Red Herring.

Liliana's Undead Minion

You can't lose the game.
+1: Each opponent loses 1 life.
−4: Destroy target creature.

Liliana's Other Contract

When Liliana's Other Contract enters the battlefield, you draw three cards and you lose 3 life.
If you would lose the game, instead exile Liliana's Other Contract, then return it to the battlefield transformed under your control.

Liliana's Other Contract // Liliana's Undead Minion

Sliv-Mizzet, Hivemind

Slivers you control have flying and "Whenever you draw a card, this creature deals 1 damage to any target" and "{T}: Draw a card."

Night of the Flying Merfolk

Bedtime story (Don't put a lore counter on this Saga as it enters. Put a lore counter on it at the beginning of your end step rather than your main phase. Sacrifice after III.)
I — Create two 1/1 blue Merfolk creature tokens.
II — Put a flying counter on each tapped creature you control.
III — Draw a card for each creature you control that dealt combat damage to a player this turn.

Slivdrazi Monstrosity

Eldrazi you control are Slivers in addition to their other types.
Slivers you control have devoid and annihilator 1.
{3}: Create a 1/1 colorless Eldrazi Sliver creature token. It has "Sacrifice this creature: Add {C}."

Taiga Stadium

Taiga Stadium enters tapped unless you control a white, blue, or black permanent.
{T}: Add {R} or {G}.

Soulmates

Enchant two creatures
Enchanted creatures each get +1/+1 and have hexproof.
When one of the enchanted creatures dies, destroy the other.

Mountain

Transcantation

Target instant or sorcery spell becomes a copy of Lightning Bolt. Its controller may choose new targets for it.

Sliver of Hope

Slivers you control have hope. (Prevent all damage that would be dealt to attacking creatures with hope.)

Island

Largepox

Each player discards a card, then loses 1 life, then sacrifices an artifact, a creature, an enchantment, a land, a planeswalker, and a tribal permanent, then exiles a card from their graveyard, then puts the top card of their library into their graveyard, then removes a counter from a permanent they control, then gets a poison counter.

Wrenn and One

+1: Wrenn and One gains "{T}: Add {G}" until your next turn.
−1: Create a 1/1 green Squirrel creature token.
−4: You get an emblem with "At the beginning of your precombat main phase, add {G} for each creature you control."

Seek Bolas's Counsel

Choose one at random —
• You get an emblem with "At the beginning of your upkeep, pay {U}{B}{R}. If you don't, you lose the game."
• Each player discards their hand.
• Planeswalk to Pools of Becoming. (Once there, you can roll the planar die only if you're playing Planechase.)
• For each opponent, exile cards from the top of their library until you exile a nonland card. You may cast those cards without paying their mana costs.
• Destroy all creatures and non-Bolas planeswalkers.
• You get an emblem with "You can cast nonland cards from your sideboard."

Plains

Map to Lorthos's Temple

Whenever you complete one of the following objectives, check it off. If all three are checked off, sacrifice Map to Lorthos's Temple. If you do, create a Lorthos, the Tidemaker token.
☐ Diving Gear — An artifact enters the battlefield under your control.
☐ Merfolk — A Merfolk enters the battlefield under your control.
☐ Ritual — You cast an instant or sorcery spell.

Waste Land

{T}: Add {C}.
{T}, Sacrifice Waste Land: Destroy target nonbasic land. That land's controller creates a Wastes token. (It's a land with {T}: Add {C}.)

Omenpath to Naya

Vanishing 4 (This land enters the battlefield with four time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
{T}: Add {R}, {G}, or {W}.

Second City

{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast your second spell in a turn. When that mana is spent, create a Deep Dish Pizza token. (It's a Food artifact with "{3}, {T}, Sacrifice this token: You gain 3 life and draw a card.")

Wrath of Sod

Put a manabond counter on all creatures. (They lose all other abilities and become lands with "{T}: Add one mana of this card's color.")

Muraganda Eldrazi

Devoid (This card has no color.)
Deworded (This creature counts as having no abilities.)
When you cast this spell, put a primeval counter on target creature. (A creature with a primeval counter loses all abilities and can't gain abilities.)

Wrath of Leknif

Destroy all creatures. They can't be regenerated. Untap up to four lands you control.

Siege Elemental

Trample
Untapped creatures can't block.
Tapped creatures can block.

Zone of Flame

Enchant zone (Battlefield, command, exile, and stack are shared zones. Each player has their own graveyard, hand, and library zones.)
Whenever one or more cards enter or leave enchanted zone, Zone of Flame deals 1 damage to each opponent. (Tokens aren't cards.)

Queue of Beetles

Haste
The stack is now first in, first out instead of last in, first out. (The first spell or ability on the stack is the first one to resolve.)

Catch of the Day

As Catch of the Day enters the battlefield, choose one for each of the following.
Keyword → Vigilance; ward {3}; or islandwalk.
Whenever this creature attacks → Scry 2; goad target creature an opponent controls; or tap target creature an opponent controls.
Size → 6/2; 4/4; or 2/6.

Rule with an Even Hand

(Start the game with this conspiracy face up in the command zone.)
You can't attack with an odd number of creatures.
Whenever you attack, double target creature's power until end of turn.

Animate Spell

Flash
Enchant instant or sorcery spell on the stack
When Animate Spell becomes attached to an instant or sorcery, put that card onto the battlefield under its owner's control. It's a creature in addition to its other types with power and toughness each equal to its converted mana cost.
When Animate Spell leaves the battlefield, enchanted card's owner sacrifices it unless they cast it.

Processing Plant

Processing Plant enters the battlefield tapped.
When Processing Plant enters the battlefield, you may put a card an opponent owns from exile into that player's graveyard. If you do, untap Processing Plant. Otherwise, exile the top card of each opponent's library.
{T}: Add {W}, {U}, {B}, or {C}.

Weaponized Scrap

Upgrade (This creature enters covering another artifact you control. If it can't, exile it. Ignore the artifact it's covering. Anywhere this card goes, cards underneath it also go. It has haste.)

Lazotep Archway

Lazotep Archway enters the battlefield tapped.
{T}: Add {W} or {B}.
Eternalize {3}{W}{B} ({3}{W}{B}, Exile this card from your graveyard: Create a token that's a copy of it, except it's a 4/4 black Zombie creature and loses all other card types. Eternalize only as a sorcery. And don't forget it still enters tapped!)

Planeswalkerificate

Enchant creature you control
Enchanted creature is a planeswalker in addition to its other types. Its toughness becomes its loyalty. (You change its toughness to activate loyalty abilities. Damage lowers toughness. Toughness doesn't heal at end of turn.) It can't block and gains the following abilities —
+1: Add {R}{R}.
−1: Exile the top card of your library. You may play it this turn.
−X: This planeswalker deals X damage to any target.

Take a Trip to...

Draw two cards. This spell deals 2 damage to each opponent. (Then exile this card. You may play the land later from exile.)

Value Town

Value Town enters the battlefield tapped.
{T}: Add {U} or {R}.

Value Town // Take a Trip to...

Essence of Ajani

(As this spell resolves, put it into the command zone.)
Whenever you cast a spell, you gain 1 life.

Unicycle

First strike, haste
Equipped creature has first strike and haste.
Equip {1}
Crew 1

Immersturm Battlefield

Hosted creatures get +2/+0 and have haste.
Host {1}{R} ({1}{R}: Host target creature at this Realm. A Realm can host any number of creatures. Host only as a sorcery.)

Rift

Before drawing your hand, you may start the game with Rift in your opening hand. If you do, draw one fewer card. (Mulligans continue as normal.)
Rift enters tapped.
{T}: Add {C}.

Alberix, the Trade Planet

Planet (When this permanent enters, exile the top five cards of your library as its resources.)
Trade Routes — At the beginning of your precombat main phase, choose one —
• Discard a card. If you do, put two of Alberix's resources into its owner's hand.
• Exile the top card of your library as a resource.

Generated Horizons

At the beginning of your upkeep, create a Forest land token.

Arcanum Things

Equipped creature has flying.
Equip {2}
Equipment swap {2}{W} ({2}{W}: Exchange this Equipment with an Equipment card in your hand. If this Equipment was attached to a creature, attach the new Equipment to that creature.)

Fetching Garden

({T}: Add {G} or {W}.)
Fetching Garden enters the battlefield tapped if it was played from your hand.

Glade of the Pump Spells

(You have to pay {2}{G} to play this land as your land drop. It's green.)
When Glade of the Pump Spells enters the battlefield, up to one target creature gets +2/+2 and gains trample until end of turn.
{T}: Add {G}{G}.

Swamp

Bucket List

Whenever you cast a spell of a type showing on Bucket List, put a counter over that type and draw a card. If all five types on Bucket List have counters over them, sacrifice it and draw one more card.
☐ artifact ☐ creature ☐ enchantment ☐ instant ☐ sorcery

Barry's Land

Recycla-bird

Flying
When Recycla-bird dies, put a flying counter on target creature you control.

Marchesa's Surprise Party

(Start the game with this conspiracy face up in the command zone. Before the game, secretly choose one of the following. During your end step, if you meet the condition, you may reveal your choice and turn this card face down. When you do, collect the reward.)
• You've cast three or more spells this turn.
• An opponent lost 6 or more life this turn.
• There are nine or more cards in your graveyard.
Reward — Draw a card.

Spaghetti Junction

{T}: Add {C}.
{4}, {T}: Create a 3/2 colorless Vehicle artifact token with crew 1.
Whenever a Vehicle you control attacks, put a traffic counter on this land.
When this land has eight traffic counters on it, sacrifice it. If you do, create Atlantakul, a legendary 20/20 colorless Eldrazi creature token with annihilator 2.

Mox Poison

{T}: Add one mana of any color. You get two poison counters.

Gobland

(Gobland isn't a spell, it's affected by summoning sickness, and it has "{T}: Add {R}.")
Gobland can't block.

Control Win Condition

This spell can't be countered.
Shroud
Control Win Condition's power and toughness are each equal to the number of turns you've taken this game. (If this is in your deck, please keep track of your turns. This means you, Mark.)

High Troller

All targeted spells and abilities cost {2} less and have their targets chosen randomly.

Louvaq, the Aberrant

Protection from modified creatures (Modified creatures have a power, toughness, or ability different than their printed versions.)
At the beginning of each player's end step, you may put a +1/+1 counter on target creature that player controls.

Gold Mine

{T}: Add {C}.
Legacy — {T}, Mark one of Gold Mine's unmarked nodes: Add one mana of any color.
☐, ☐, ☐, ☐, ☐

All-You-Can-Eat Buffet

You may look at the top card of your library any time.
You may play lands and cast creature spells from the top of your library.
The top card of your library is a Food token. It's still a card. (It has "{2},{T}, Sacrifice this token: You gain 3 life.")

Destroy target creature. Its controller creates two 1/2 red Half creature tokens.

Smelt

Smelt // Herd // Saw

Personal Decoy

Personal Decoy enters with a number of loyalty counters on it equal to your life total. If it would leave the battlefield, exile it instead of putting it anywhere else. You can't be attacked.
+1: You gain 1 life.
−4: Draw a card.

TL;DR

Exile target creature if it has any abilities other than keywords. (Flying, protection, and partner are all keywords. See rule 702 for details. Landfall and scry aren't keywords; they're an ability word and a keyword action respectively. Yes, there's a difference.)

Naturalize 2

Destroy target artifact, enchantment, emblem, or gameplay tracker. (Trackers include play aids such as dungeons, city's blessing, and monarch. When you destroy it, the associated object or designation is removed from the game.)

Lutri, Pauper Otter

Companion — Your starting deck contains no cards with a silver, gold, orange, or purple expansion symbol. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} as a sorcery.)
When Lutri, Pauper Otter enters the battlefield, discard your hand, then draw three cards.

Sunimret

Reverse miracle {B} (If this card is on the bottom of your library as you begin searching it, you may cast it by paying its reverse miracle cost.)
Exile all creatures.

Boulder Jockey

({D} is a land drop. You may give up one potential land drop this turn to pay for {D}.)
Whenever Boulder Jockey attacks, you may pay {D}. If you do, create a 3/3 colorless Construct artifact creature token named Boulder that's tapped and attacking. Sacrifice that token at the beginning of the next end step.

Magus of the Chains

If a player would draw a card except the first one they draw in each of their draw steps, that player discards a card instead. If the player discards a card this way, they draw a card. If the player doesn't discard a card this way, they mill a card.

Evil Boros Charm

Choose one —
• Evil Boros Charm deals 2 damage to any target and you gain 2 life.
• Unblocked attacking creatures get +1/+0 until end of turn.
• Create a 1/1 colorless Spirit creature token with lifelink and haste.

Heart of a Duelist

You may draw cards from anywhere in your library. (You don't get to look at them or reorder them while doing so.)
When Heart of a Duelist enters the battlefield, draw a card.

Forest

Frontier Explorer

{3}, {T}: Until end of turn, you may play one basic Plains card from outside the game.

Duelists' Convocation International

When Duelists' Convocation International enters the battlefield, choose a 10-digit number at random and write it down.
Whenever you play a land or cast a spell, if it shares a mana value with one or more uncrossed digits in the chosen number, cross out one of those digits and draw a card. Then if all ten digits are crossed out, you win the game.

Under-Construction Skyscraper

Level up {1} ({1}: Put a level counter on this. Level up only as a sorcery.)
{T}: Add {C}.
LEVEL 1-7
{T}: Add {W}, {B}, {G}, or {C}.
LEVEL 8+
{T}: Add {W}, {B}, {G}, or {C}. Scry 1.

Maestros' Totally Safe Hideout

Land casualty 2 (As this land enters, you may sacrifice a creature with power 2 or greater. If you do, create a token that's a copy of this land.)
Maestros' Totally Safe Hideout enters the battlefield tapped.
{T}: Add {U}, {B}, or {R}.

Fire

Fire deals 2 damage divided as you choose among one or two targets.

Start

Create two 1/1 white Warrior creature tokens with vigilance.

Start // Fire

Spellmorph Raise Dead

Return target creature card from your graveyard to your hand.
Spellmorph {B} (You may cast this card face down as a 2/2 creature for {3}. Cast it any time for its spellmorph cost.)

Form of the Mulldrifter

When Form of the Mulldrifter enters, draw two cards.
You may cast creature cards from your hand as though they were the card Mulldrifter. (You can still evoke this way. They're Mulldrifters.)

Mirrored Lotus

Reflect {0} (As this enters, each opponent may pay {0}. When they do, they create a token copy of this except it lacks this ability.)
{T}, Exile Mirrored Lotus: Add three mana of any one color.

Noxious Bayou

{T}: Add {B} or {G}. You get a poison counter.

Cleaver Blow

Multicleave {1} (You may pay an additional {1} any number of times as you cast this spell. For each time you do, choose a paired set of square brackets and remove the words in between.)
Destroy target [nonblack] creature [with mana value 3 or less] [an opponent controls]. You [and its controller each] draw a card [and lose 2 life]. Create a [tapped] 1/1 white Spirit creature token with flying.

Wisedrafter's Will

Your opponents play with their hands revealed.
{U}, Sacrifice Wisedrafter's Will: Draw a card.
{U}{U}, Sacrifice Wisedrafter's Will: Counter target spell.

Aggressive Crag

At the beginning of your combat step, tap Aggressive Crag.
{T}: Add {R} or {W}.

Domesticated Watercourse

Domesticated Watercourse enters tapped.
{T}: Add {U} or {B}.
{U}{B}: Until end of turn, Domesticated Watercourse becomes an Equipment artifact with equip {2}.
Whenever equipped creature deals combat damage to a player, draw a card.

Temur Elevator

Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.)
{T}: Add {G}, {U}, or {R}. If you don't have the city's blessing, you lose 1 life.

Mana Abundance

If a player would add mana, instead all players add that mana.

Baneslayer Aspirant

Baneslayer Aspirant gets +3/+3 and has flying, first strike, and lifelink as long as you have one or more emblems.

Teferi, Druid of Argoth

Flash
Creature cards you own that aren't on the battlefield have flash.
Each opponent can cast spells only any time they could cast a sorcery.

Jund 'Em Out

Retrace (Sorry, no room for reminder text.)
Choose one at random. Create a copy of the chosen card. You may cast the copy without paying its mana cost.
• Abrupt Decay
• Blightning
• Bloodbraid Elf
• Lightning Bolt
• Liliana of the Veil
• Tarmogoyf

Growth Charm

Choose one —
• Rampant Growth
• Giant Growth
• Regrowth

Noble Ox

Flash
When Noble Ox enters the battlefield, all unblocked creatures attacking you become blocked by Noble Ox.
Noble Ox can block any number of creatures.