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.)

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

Starting Town NPC

Each creature card in your hand has a {1}{G} Adventure sorcery named Fetch Herbs with "You gain 2 life." (You may cast it as the Adventure for {1}{G}. Then exile it, and you may cast the creature later from exile.)
Each creature card you cast from exile enters the battlefield with an additional +1/+1 counter on it.

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.)

No-Regrets Egret

Flying
Any time you could mulligan and No-Regrets Egret is in your hand, you may reveal No-Regrets Egret. If you do, look at the top two cards of your library. (Put those cards back in the same order. You can still mulligan.)

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...

Pinchy McStingbutt

Deathtouch
Whenever Pinchy McStingbutt deals combat damage to a player, conjure a card named Death of a Thousand Stings, Lethal Sting, or Stinging Shot at random into your hand and reveal it. (Treat conjured cards like cards.)

Slumbering Waterways

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

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!)

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.)

Knight of Lost Causes

Vigilance
As long as you are way behind, Knight of Lost Causes gets +3/+3 and has indestructible. (You are way behind if, at any point during this turn, an opponent had 10 or more life than you, controlled at least three more creatures than you, or had at least three more cards in hand than you.)

Their

Target opponent gains control of target creature you control.

There

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

There // They're // Their

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.

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.

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

Narod, the Beige Flower

Each creature assigns combat damage equal to its mana value rather than its power.

Oddric, Lunar Marquis

At the beginning of each combat, creatures you control gain banding until end of turn if a creature you control has banding. The same is true for changeling, devoid, fear, flanking, horsemanship, ingest, intimidate, landwalk, shroud, tantrum, wither, and the activated ability "Sacrifice this creature: Add {C}."

Orb of Origin

{2}: Add one mana of any color.
Other noncreature artifacts are mono and continuous. (Each activated ability of mono artifacts costs an additional {T} to activate if its cost doesn't already include {T}. As long as a continuous artifact is tapped, it loses all abilities.)

Stone Drake

Flying
When Stone Drake enters the battlefield, choose one —
• Distract — Tap target land. Draw a card.
• Enthrall — Target player discards a card for each spell you've cast this turn.

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

Search Elemental

Whenever you search your library, scry 1.
Scryfall — Whenever you scry, put a +1/+1 counter on Search Elemental. It can't be blocked this turn.

Questing Cosplayer

When Questing Cosplayer enters the battlefield, create a Questing Role token and attach it to target creature. (If you control another Role on it, put that one into the graveyard. Enchanted creature has all the abilities of Questing Beast.)

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.

Yawgmoth's Day Planner

{T}, Pay 2 life: Add {B}{B}.
You may cast spells from your graveyard. Only mana produced by abilities that caused you to lose life may be spent to cast spells this way. (Damage causes loss of life.)
If a card would be put into your graveyard from anywhere, exile it instead.

Madlands

Madlands enters the battlefield tapped.
{T}: Add {B} or {R}.
Madness {0} (If you discard this card, discard it into exile. When you do, play it for its madness cost or put it into your graveyard. You can play a land only during your turn and only if you have an available land play remaining.)

Toddler's Rage

Flash
Enchant creature
Enchanted creature gets +2/+1 and has tantrum. (It's like trample but for blocking.)

Panglacial Shinobi

Library ninjutsu {1}{U} ({1}{U}, Shuffle an unblocked attacker you control into its owner's library: Put this card onto the battlefield from your library tapped and attacking. Activate only while searching your library.)
Whenever Panglacial Shinobi deals combat damage to a player, draw a card.

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}.

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.

Subgoyf

Subgoyf's power and toughness are each equal to the number of different subtypes other than creature types among cards in all graveyards and its toughness is equal to that number plus 1. (Subtypes include but are absolutely not limited to: Plains, Equipment, Aura, Arcane, Jace, Curse, Urza's, Ulamog's, etc.)

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.

Omnipresent Impostor

Changeling
Omnipresent Impostor has all card names.
As you search your library for one or more cards, you may choose Omnipresent Impostor as one of those cards. (For example, if you search for two land cards, you may find Omnipresent Impostor and a land card.)

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.

Tax Taker

Whenever an opponent pays a tax from a spell or permanent you control, create a number of Treasure tokens equal to the amount of mana they paid. (This happens each time a spell you control or an ability of a permanent you control causes an opponent to pay extra mana. Cards that can tax opponents include Mana Tithe, Esper Sentinel, and Ghostly Prison.)

Phyrexian Seedling

Phyrexian Seedling enters the battlefield with a +1/+1 counter on it.
Proliferatelink (Damage dealt by this creature also causes you to proliferate that many times. You proliferate before checking for lethal damage on creatures.)

Jeskai Baller

When you cast this spell, create a 1/1 white Athlete creature token.
Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)

Toofer, Keeper of the Full Grip

Whenever a spell you control causes you to gain card advantage, each opponent loses 2 life. (You gain card advantage each time a spell you control resolves and you end up having more cards relative to your opponents than before that spell resolved. Divination, Annihilate, and Wrath of God can all be card advantage. And remember: tokens aren't cards!)

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.)

Pyromancy 101

Pyromancy 101 deals 1 damage to any target.
Teach {1}{R} (Then exile this spell taught to a creature you control. For as long as this card remains exiled, that creature has "{T}: Copy the exiled card. You may cast the copy for its teach cost.")

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.

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.

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.

Wrath of Leknif

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

Intangible Vibes

All creatures are tokens. (They're considered tokens for spells and abilities. After a creature leaves the battlefield, it ceases to exist.)

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}.

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."

You Compleat Me

If your life total is greater than 10, it becomes 10. For the rest of the game, your maximum life total is 10. You get an emblem with "Pay 2 life: Add one mana of any color" and "At the beginning of your upkeep, you draw a card and you lose 1 life."

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.

Lich's Duel Mastery

Hexproof
When Lich's Duel Mastery enters the battlefield, exile the top five cards of your library face down as shields.
If you would lose life, instead put one of your shields into your hand. If you can't, sacrifice Lich's Duel Mastery.
When Lich's Duel Mastery leaves the battlefield, you lose the game.

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}.

The Heron Moon

{T}: Add {C}.
{1}, {T}: Exile the bottom card of target opponent's library.
Whenever one or more cards an opponent owns are put into exile, put a release counter on The Heron Moon. Then if it has thirteen or more release counters on it, sacrifice it and create a copy of Emrakul, the Promised End. Cast it without paying its mana cost.

Penumbra Umbra

Enchant creature you control
When Penumbra Umbra is put into a graveyard from the battlefield, create a token that's a copy of enchanted creature, except the token is black.
Umbra armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)

Meandered Towershell

Enchant creature
Enchanted creature has islandwalk and "Whenever this creature attacks, exile it and Meandered Towershell. Return it to the battlefield under your control tapped and attacking at the beginning of the declare attackers step on your next turn, then return Meandered Towershell to the battlefield under its owner's control attached to that creature."

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.

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.)

Wormhole Warp

Exile target creature an opponent controls. That player reveals cards from their sideboard at random until they reveal a nonland card. They may cast that card without paying its mana cost.

Rin and Seri, Inseparabler

All Cats you control are Dogs in addition to their other types.
All Dogs you control are Cats in addition to their other types.
Cats and Dogs you control have haste.