Flying

: Target permanent becomes blue in addition to its other colors until end of turn.

Bloodthirst X (This creature enters with X +1/+1 counters on it, where X is the damage dealt to your opponents this turn.)

Menace

Enrage — Whenever Indoraptor, the Perfect Hybrid is dealt damage, choose an opponent at random. Indoraptor deals damage equal to its power to that player unless they sacrifice a nontoken creature of their choice.

Enchant creature

Enchanted creature gets +4/+4 and has first strike, and all creatures able to block it do so.

Umbra armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)

Flying

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

At the beginning of your end step, if you gained 3 or more life this turn, each opponent loses 3 life.

Flying

Whenever you cast a Spirit or Arcane spell, target player reveals their hand and discards all cards with that spell's mana value.

Enchant creature

Enchanted creature gets +2/+0 and has "When this creature dies, draw a card."

Flash

When Infested Thrinax enters, until end of turn, whenever a nontoken creature you control dies, create a number of 1/1 green Saproling creature tokens equal to that creature's power.

Target creature gets +3/+2 until end of turn.

Whenever a creature dies, you may pay . If you do, draw a card.

Flying

: Exile target creature card from a graveyard. Put a +1/+1 counter on Inherited Fiend.

Inquisition Agents — Whenever equipped creature attacks, create a 2/2 white Astartes Warrior creature token with vigilance that's attacking. Then attacking creatures gain menace until end of turn.

Equip (: Attach to target creature you control. Equip only as a sorcery.)

, , Sacrifice Inscribed Tablet: Reveal the top five cards of your library. Put a land card from among them into your hand and the rest on the bottom of your library in a random order. If you didn't put a card into your hand this way, draw a card.

Kicker

Choose one. If this spell was kicked, choose any number instead.

• Return up to two target creatures to their owners' hands.

• Scry 2, then draw two cards.

• Target player creates an X/X blue Illusion creature token, where X is the number of cards in their hand.

Flash

Flying

Whenever you cast a Wizard spell, you may untap Inspired Sprite.

: Draw a card, then discard a card.

When Inspiring Bard enters, choose one —

• Bardic Inspiration — Target creature gets +2/+2 until end of turn.

• Song of Rest — You gain 3 life.

When Inspiring Captain enters, creatures you control get +1/+1 until end of turn.

Whenever another creature you control with power 2 or less enters, you gain 1 life and draw a card.

Flying

When this creature enters, you gain 1 life and draw a card.

Draw two cards. Exile Inspiring Refrain with three time counters on it.

Suspend 3— (Rather than cast this card from your hand, you may pay and exile it with three time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost.)

Nonartifact spells you cast have improvise. (Your artifacts can help cast those spells. Each artifact you tap after you're done activating mana abilities pays for .)

Inspiring Vantage enters tapped unless you control two or fewer other lands.

: Add or .

Untap target creature. It gets +2/+4 until end of turn.

Choose an opponent. You and that player each draw three cards.

Choose an opponent. Untap all nonland permanents you control and all nonland permanents that player controls.

(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 Dominaria enters, you gain 4 life and draw a card.

Choose target spell, then flip a coin. If you win the flip, gain control of that spell and you may choose new targets for it. If you lose the flip, counter that spell.

Flying

As Iona, Shield of Emeria enters, choose a color.

Your opponents can't cast spells of the chosen color.

When Irascible Wolverine enters, exile the top card of your library. Until end of turn, you may play that card.

Plot (You may pay and exile this card from your hand. Cast it as a sorcery on a later turn without paying its mana cost. Plot only as a sorcery.)

Flying, protection from each color

Flying

When Iridescent Drake enters, put target Aura card from a graveyard onto the battlefield under your control attached to Iridescent Drake.

Offspring (You may pay an additional as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.)

Landfall — Whenever a land you control enters, this creature deals 1 damage to target opponent.

Green enchantment spells and white enchantment spells cost more to cast.

Exile target artifact or enchantment.

Irrigation Ditch enters tapped.

: Add .

, Sacrifice Irrigation Ditch: Add .

Flying

Whenever Isperia the Inscrutable deals combat damage to a player, choose a card name. That player reveals their hand. If a card with the chosen name is revealed this way, search your library for a creature card with flying, reveal it, put it into your hand, then shuffle.

Flying

When Isperia's Skywatch enters, detain target creature an opponent controls. (Until your next turn, that creature can't attack or block and its activated abilities can't be activated.)

First strike, trample, lifelink

Flying

Iymrith, Desert Doom has ward as long as it's untapped.

Whenever Iymrith deals combat damage to a player, draw a card. Then if you have fewer than three cards in hand, draw cards equal to the difference.

, : Target creature gains flanking until end of turn. <I>(Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.)</I>

If you would draw a card while your library has no cards in it, you win the game instead.

+1: Target player mills two cards. Draw a card.

−8: Draw seven cards. Then if your library has no cards in it, you win the game.

When Jaddi Lifestrider enters, you may tap any number of untapped creatures you control. You gain 2 life for each creature tapped this way.

, : Shuffle Jalum Grifter and two lands you control face down. Target opponent chooses one of those cards. Turn the cards face up. If they chose Jalum Grifter, sacrifice it. Otherwise, destroy target permanent.

Trample

Whenever you cast a historic spell, Jamie McCrimmon gets +X/+X until end of turn, where X is that spell's mana value. (Artifacts, legendaries, and Sagas are historic.)

Doctor's companion (You can have two commanders if the other is the Doctor.)

Jarad, Golgari Lich Lord gets +1/+1 for each creature card in your graveyard.

, Sacrifice another creature: Each opponent loses life equal to the sacrificed creature's power.

Sacrifice a Swamp and a Forest: Return Jarad from your graveyard to your hand.

When Jeering Homunculus enters, you may goad target creature. (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.)

Companion — No card in your starting deck has more than one of the same mana symbol in its mana cost. (If this card is your chosen companion, you may put it into your hand from outside the game for as a sorcery.)

: Add . This mana can't be spent to pay generic mana costs.

First strike, haste

: Jeska, Warrior Adept deals 1 damage to any target.

Flying

Sacrifice two lands: Jeweled Spirit gains protection from artifacts or from the color of your choice until end of turn.

Whenever a nontoken permanent is put into your graveyard from the battlefield, Jinxed Ring deals 1 damage to you.

Sacrifice a creature: Target opponent gains control of Jinxed Ring. <I>(This effect lasts indefinitely.)</I>

When Jirina, Dauntless General enters, exile target player's graveyard.

Sacrifice Jirina: Humans you control gain hexproof and indestructible until end of turn.

Whenever you attack with one or more creatures with power 4 or greater, create a Treasure token.

, Sacrifice a Treasure: Jolene, Plundering Pugilist deals 1 damage to any target.