Bombardment

Until end of turn, cards you own that aren't on the battlefield lose all card types, costs, names, and abilities and become red sorceries named Missile that cost {R} with "Missile deals 2 damage to any target."

Everythingamajig

Sacrifice a land: You gain 2 life.
Sacrifice a creature: Add {C}{C}.
{2}, Discard a card: Search your library for a card that shares a complete word in its name with the name of the discarded card, reveal it, put it into your hand, then shuffle.

Shichifukujin Dragon

When Shichifukujin Dragon comes into play, put seven +1/+1 counters on it.
{R}{R}{R}, Sacrifice two +1/+1 counters: Put three +1/+1 counters on Shichifukujin Dragon at end of turn. Play this ability as a sorcery.

One with Death

Join the Group

You may put a legendary creature card from your hand into the command zone. It's also your commander.

Champions of Archery

Reach
Commanders you control get +X/+0, where X is the number of commanders you control.

Champions of Archery // Join the Group

Island

Leyline of Anticipation

If Leyline of Anticipation is in your opening hand, you may begin the game with it on the battlefield.
You may cast spells as though they had flash.

Imaginary Friends

Create three 0/0 white Spirit creature tokens with flying.

Animate Library

Enchant your library
Enchanted library is an artifact creature on the battlefield with power and toughness each equal to the number of cards in it. It's still a library.
If enchanted library would leave the battlefield, exile Animate Library instead.

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.

Dungeon Master

+1: Target opponent creates a 1/1 black Skeleton creature token with "When this creature dies, each opponent gains 2 life."
+1: Roll a d20. If you roll a 1, skip your next turn. If you roll a 12 or higher, draw a card.
−6: You get an adventuring party. (Your party is a 3/3 red Fighter with first strike, a 1/1 white Cleric with lifelink, a 2/2 black Rogue with hexproof, and a 1/1 blue Wizard with flying.)

Split Screen

When Split Screen enters, shuffle your library and deal it into four libraries. If anything refers to your library, choose one of your libraries for it.
Play with your libraries' top cards revealed.
When Split Screen leaves the battlefield, shuffle your libraries together.

Sword of Dungeons & Dragons

Equipped creature gets +2/+2 and has protection from Rogues and from Clerics.
Whenever equipped creature deals combat damage to a player, create a 4/4 gold Dragon creature token with flying and roll a d20 (a twenty-sided die). If you roll a 20, repeat this process.
Equip {2}

Hangman

As Hangman enters, secretly note a word with six to eight letters.
{1}: Target player who doesn't control Hangman guesses the noted word or an unguessed letter in that word. If they guess wrong, put a +1/+1 counter on Hangman. Any player may activate this ability.
When a player guesses the noted word or all of its letters, sacrifice Hangman.

Kharis & The Beholder

Flying
When Kharis & The Beholder enters and at the beginning of your upkeep, create a 1/1 white Human creature token and make a charisma check. (Roll a d20.)
• If the result plus the number of creatures you control is greater than 11, put a +1/+1 counter on each creature you control.
• If the result is a natural 20, for each nonlegendary creature you control, create a token that's a copy of that creature.

{1}, {T}: Scry 2.
{1}, {T}, Pay 1 life: Create a 0/1 white Goat creature token.
{7}, {T}, Sacrifice Everythingamajig: Choose target player. At the beginning of the next end step, exchange life totals with that player, exchange control of all permanents you and that player control, and exchange cards in your hands, cards in your libraries, and cards in your graveyards.

Bone Rattler

When Bone Rattler is put into your graveyard from anywhere, exile it. When you do, create four Reassembling Skeleton token cards and put them into your graveyard.

Plains

Stone-Throwing Devils

Tibalt the Chaotic

+1: Cast a copy of one of the following cards chosen at random—Ignorant Bliss, Crack the Earth, Blazing Volley.
−3: Cast a copy of one of the following cards chosen at random—Seething Song, Dance with Devils, Flamebreak.
−6: Cast a copy of one of the following cards chosen at random—Hellion Eruption, Insurrection, Warp World.

Jihad

As Jihad enters, choose a color and an opponent.
White creatures get +2/+1 as long as the chosen player controls a nontoken permanent of the chosen color.
When the chosen player controls no nontoken permanents of the chosen color, sacrifice Jihad.

Sol, Advocate Eternal

Legendary partner (You can have two commanders if this is one of them. The other one is promoted to legendary.)
Flying, vigilance
Teamwork — Whenever you attack or block with both Sol, Advocate Eternal and its partner, support 4 and investigate four times.

Generated Horizons

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

Swamp

Cheatyface

If Cheatyface is in your hand, you may sneak Cheatyface onto the battlefield. If an opponent catches you right away, that player may exile Cheatyface.
Flying

Diabolical Salvation

Split second
Create four 4/4 red Devil creature tokens with haste and "When this creature dies, create a colorless Treasure artifact token with '{T}, Sacrifice this artifact: Add one mana of any color.'" Sacrifice the Devil tokens at the beginning of the next end step.

Just Desserts

Just Desserts deals π damage to target creature. (π is the ratio of a circle's circumference to its diameter. (It's a smidgen more than 3.))

Euroakus

When Euroakus enters, create a number of 1/1 blue Human Wizard creature tokens equal to the number of differently named lands you control.
{4}{G}{U}: Draw a card for each Wizard you control. They each get +1/+1 until end of turn for each card in your hand.

Truth or Dare

Target opponent chooses one —
• Truth — That player plays with their hand revealed for the rest of the game.
• Dare — Mill all but the bottom ten cards of that player's library. (To mill, put the top card of that library into its owner's graveyard.)

You're in Command

Choose target creature you own and control. That creature becomes your commander. Any other commanders you have are no longer your commander. (That creature starts with a commander tax of {0}.)

Impatient Iguana

If Impatient Iguana is in your opening hand and you're not the starting player, you may reveal it. If you do, you become the starting player.
Haste

The Legend of Arena

The Legend of Arena can be your commander.
I, II — Create a 2/1 red Human Wizard creature token. Spells you cast this turn cost {1} less to cast for each Wizard you control.
III — Search your library for a planeswalker card, put it onto the battlefield, then shuffle your library. It enters with an additional loyalty counter on it for each Wizard you control.

{1}: Flip a coin. If you win the flip, add {C}{C}. Activate only as an instant.
{3}, {T}: Target player discards a card. Activate only during your turn.
{X}: Everythingamajig becomes an X/X Construct artifact creature until end of turn.

Chandra, Gremlin Wrangler

+1: Create a 2/2 red Gremlin creature token.
−2: Chandra, Gremlin Wrangler deals X damage to target creature or player, where X is the number of Gremlins you control.

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.

Reliquary Tower

You have no maximum hand size.
{T}: Add {C}.

Invoke Prejudice

Whenever an opponent casts a creature spell that doesn't share a color with a creature you control, counter that spell unless that player pays {X}, where X is its mana value.

{2}, {T}: Move a counter from one permanent onto another. If the second permanent refers to any kind of counter, the moved counter becomes one of those counters. Otherwise, it becomes a +1/+1 counter.
{3}, {T}: Put a +1/+1 counter on target creature.
{4}, {T}: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

M'Odo, the Gnarled Oracle

Eminence — {X}, Discard a card: Target player reveals cards from the top of their library until they reveal a creature card with converted mana cost X or less. Put that card onto the battlefield under your control, then that player shuffles the rest into their library. Activate this ability only if M'Odo, the Gnarled Oracle is on the battlefield or in the command zone.

{2}, {T}: Draw a card. Activate only if you have no cards in hand.
{8}, {T}: You gain 10 life.
{4}, {T}, Sacrifice Everythingamajig: You may put a silver-bordered or acorn permanent card from your hand onto the battlefield.

Imprison

Enchant creature
Whenever a player activates an ability of enchanted creature with {T} in its activation cost that isn't a mana ability, you may pay {1}. If you do, counter that ability. If you don't, destroy Imprison.
Whenever enchanted creature attacks or blocks, you may pay {1}. If you do, tap the creature, remove it from combat, and creatures it was blocking that had become blocked by only that creature this combat become unblocked. If you don't, destroy Imprison.

The Grand Calcutron

The Grand Calcutron can be your commander.
When The Grand Calcutron enters, each player's hand becomes a program (an ordered row of revealed cards).
Players can only play the first card of their program.
If a card would be put into a player's hand from anywhere, that player reveals it and places it anywhere within their program instead.
At the beginning of each player's end step, if that player's program has fewer than five cards, they draw cards equal to the difference.

Gorilla Tactics

Create a 2/2 green Gorilla creature token.
When a spell or ability an opponent controls causes you to discard Gorilla Tactics, create two 2/2 green Gorilla creature tokens.

Booster Tutor

Open a sealed Magic booster pack, reveal the cards, and put one of them into your hand. (Remove that card from your deck before beginning a new game.)

Soulmates

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

Infinity Elemental

The Grand Tour

Exile target permanent, then put it into its owner's hand. That player discards that card, then puts it on top of their library. Then they put it onto the battlefield.

Optimus Prime, Inspiring Leader

{1}: Turn target permanent you control to its other face.
{1}: Until end of turn, Optimus Prime, Inspiring Leader becomes a Construct with base power and toughness 6/6 and creatures you control gain trample.

Command Tower

{T}: Add one mana of any color in your commander's color identity.

Pradesh Gypsies

{1}{G}, {T}: Target creature gets -2/-0 until end of turn.

A Good Thing

Spells and abilities you control can't destroy, exile, target, or cause you to sacrifice A Good Thing.
At the beginning of your upkeep, double your life total. Then, if you have 1,000 or more life, you lose the game.

Mana Abundance

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

Cleanse

Extremely Slow Zombie

Last strike (This creature deals combat damage after creatures without last strike.)

Time Sidewalk

Take an extra turn after this one.
If this card is in your opening hand, you may exile it. If you do, create four Time Walk token cards and shuffle them into your deck.

Nira, Hellkite Duelist

Flash
Flying, trample, haste
When Nira, Hellkite Duelist enters, the next time you would lose the game this turn, instead draw three cards and your life total becomes 5.

Mountain

Braid of Fire

Cumulative upkeep—Add {R}. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

{T}: Add one mana of any color.
{1}, {T}: Say the flavor text on a card in your hand. Target opponent guesses that card's name. You may reveal that card. If you do and your opponent guessed wrong, draw a card.
{8}, {T}: Everythingamajig deals 12 damage to target creature.

Mountain Mover

Flying, haste
Whenever Mountain Mover enters or attacks, put a Mountain card from outside the game underneath it.
When Mountain Mover leaves the battlefield, put all cards underneath it onto the battlefield.
Crew 3

Forest

Priority Avenger

Flying
Players can't cast instant spells unless a spell or ability is on the stack.

Transcantation

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

Enroll in the Coalition

You are a Flagbearer.
While choosing targets as part of casting a spell or activating an ability, your opponents must choose at least one Flagbearer if able.

Crusade

Inzerva, Master of Insights

+2: Draw two cards, then discard a card.
−2: Look at the top two cards of each other player's library, then put any number of them on the bottom of that library and the rest on top in any order. Scry 2.
−4: You get an emblem with "Your opponents play with their hands revealed" and "Whenever an opponent draws a card, this emblem deals 1 damage to them."

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.)

Khod, Etlan Shiis Envoy

All lands are Islands in addition to their other types.
Other Homarids, Camarids, Cephalids, Nautilids, and Merfolk you control get +1/+1.

Hot Fix

You have ten seconds to look at and rearrange the cards in your library. At the end of those ten seconds, if you're touching one or more of those cards, shuffle.

Corrupted Key

As long as Corrupted Key is tapped, creatures you control have menace and deathtouch.