(As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.)

When Invasion of Ravnica enters, exile target nonland permanent an opponent controls that isn't exactly two colors.

(As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.)

When Invasion of Segovia enters, create two 1/1 blue Kraken creature tokens with trample.

(As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.)

When Invasion of Tarkir enters, reveal any number of Dragon cards from your hand. When you do, Invasion of Tarkir deals X plus 2 damage to any other target, where X is the number of cards revealed this way. (X can be 0.)

(As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.)

When Invasion of Theros enters, search your library for an Aura, God, or Demigod card, reveal it, put it into your hand, then shuffle.

(As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.)

When Invasion of Ulgrotha enters, it deals 3 damage to any other target and you gain 3 life.

(As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.)

When Invasion of Xerex enters, return up to one target creature to its owner's hand.

All creatures block each combat if able.

The attacking player chooses how each creature blocks each combat.

At the beginning of combat on your turn, switch the power and toughness of each of any number of target creatures until end of turn.

Enchant creature

Enchanted creature has "Whenever this creature attacks, create a 4/4 white Angel creature token with flying that's tapped and attacking. Exile that token at end of combat."

, Remove a +1/+1 counter or a charge counter from a permanent you control: Ion Storm deals 2 damage to any target.

Enchant creature

Enchanted creature gets +2/+2, has vigilance, and can block an additional creature each combat.

Counter target spell. Ionize deals 2 damage to that spell's controller.

Create a token that's a copy of target creature you control, except the token has flying and it isn't legendary.

Iron Apprentice enters with a +1/+1 counter on it.

When Iron Apprentice dies, if it had counters on it, put those counters on target creature you control.

Vigilance

Iron Golem attacks or blocks each combat if able.

Haste

Fabricate 1 (When this creature enters, put a +1/+1 counter on it or create a 1/1 colorless Servo artifact creature token.)

Whenever Iron Mastiff attacks, roll a d20 for each player being attacked and ignore all but the highest roll.

1–9 | Iron Mastiff deals damage equal to its power to you.

10–19 | Iron Mastiff deals damage equal to its power to defending player.

20 | Iron Mastiff deals damage equal to its power to each opponent.

Whenever a player casts a red spell, you may pay . If you do, you gain 1 life.

Iron Verdict deals 5 damage to target tapped creature.

Foretell (During your turn, you may pay and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Haste

Iron-Barb Hellion can't block.

When Ironclad Revolutionary enters, you may sacrifice an artifact. If you do, put two +1/+1 counters on Ironclad Revolutionary and each opponent loses 2 life.

Ironclaw Buzzardiers can't block creatures with power 2 or greater.

: Ironclaw Buzzardiers gains flying until end of turn.

Ironclaw Orcs can't block creatures with power 2 or greater.

First strike

At the beginning of each upkeep, if a player cast two or more spells last turn, transform Ironfang.

Reach

Whenever you cast your second spell each turn, Iron-Fist Pulverizer deals 2 damage to target opponent. Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

Trample, haste

Channel — , Discard Ironhoof Boar: Target creature gets +3/+1 and gains trample until end of turn.

When Ironpaw Aspirant enters, put a +1/+1 counter on target creature.

Ironroot Warlord's power is equal to the number of creatures you control.

: Create a 1/1 white Soldier creature token.

When Ironshell Beetle enters, put a +1/+1 counter on target creature.

Crew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn.)

Irrigation Ditch enters tapped.

: Add .

, Sacrifice Irrigation Ditch: Add .

Flying

Whenever an opponent casts a spell, put a +1/+1 counter on Ishai, Ojutai Dragonspeaker.

Partner (You can have two commanders if both have partner.)

Imprint — When Isochron Scepter enters, you may exile an instant card with mana value 2 or less from your hand.

, : You may copy the exiled card. If you do, you may cast the copy without paying its mana cost.

Whenever an opponent casts a creature spell, that player loses 2 life unless they pay .

If a creature attacking causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Flying, vigilance, toxic 2

Corrupted — At the beginning of your end step, each opponent who has three or more poison counters exiles the top card of their library face down. You may look at and play those cards for as long as they remain exiled, and you may spend mana as though it were mana of any color to cast those spells.

Menace

Whenever Izoni, Center of the Web enters or attacks, you may collect evidence 4. If you do, create two 2/1 black and green Spider creature tokens with menace and reach.

Sacrifice four tokens: Surveil 2, then draw two cards. You gain 2 life.

When Izzet Chronarch enters, return target instant or sorcery card from your graveyard to your hand.

Whenever you draw a card, put a +1/+1 counter on Jace's Projection.

: Put a loyalty counter on target Jace planeswalker.

: Add . When you spend this mana to cast a Dragon creature spell, it enters with an additional +1/+1 counter on it and gains hexproof until your next turn. (It can't be the target of spells or abilities your opponents control.)

Counter target spell if it shares a color with a creature you control.

, : Target creature can't block this turn.

+1: Create a 3/3 Kavu creature token with trample that's all colors.

−3: Choose up to two target creatures. For each of them, put a number of +1/+1 counters on it equal to the number of colors it is.

−6: Return target multicolored card from your graveyard to your hand. If that card was all colors, draw a card and create two Treasure tokens.

Jared Carthalion can be your commander.

Whenever Jareth, Leonine Titan blocks, it gets +7/+7 until end of turn.

: Jareth gains protection from the color of your choice until end of turn.

Whenever a Zombie or Mutant you control dies, if its power was different from its base power, draw a card.

Come Fly With Me — , Sacrifice a creature: Put a +1/+1 counter on target creature you control. It gains flying until end of turn.

: Target red creature gains haste until end of turn.

Vigilance

When Jedit's Dragoons enters, you gain 4 life.

Black spells you cast cost less to cast.

Kicker (You may pay an additional as you cast this spell.)

Scry 2, then draw a card. If this spell was kicked, you may put a land card from your hand onto the battlefield.

At the beginning of your end step, target opponent gains control of up to one target creature you control. Put two +1/+1 counters on it and tap it. It's goaded for the rest of the game and it gains "This creature can't be sacrificed." (It attacks each combat if able and attacks a player other than you if able.)

Whenever a creature you own but don't control attacks, you draw a card.