, Discard a card: Prevent the next 3 damage that would be dealt to any target this turn.

, Sacrifice Hypochondria: Prevent the next 3 damage that would be dealt to any target this turn.

Creatures your opponents control get -4/-0 until end of turn.

Science Teacher — Each Saga spell you cast has replicate. The replicate cost is equal to its mana cost. (When you cast that Saga, copy it for each time you paid its replicate cost. Copies of permanents enter the battlefield as tokens.)

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

Whenever Ian the Reckless attacks, if it's modified, you may have it deal damage equal to its power to you and any target. (Equipment, Auras you control, and counters are modifications.)

, , Discard a card: Create two 1/1 white Citizen creature tokens.

Icatian Javelineers enters the battlefield with a javelin counter on it.

, Remove a javelin counter from Icatian Javelineers: It deals 1 damage to any target.

Icatian Moneychanger enters the battlefield with three credit counters on it.

When Icatian Moneychanger enters the battlefield, it deals 3 damage to you.

At the beginning of your upkeep, put a credit counter on Icatian Moneychanger.

Sacrifice Icatian Moneychanger: You gain 1 life for each credit counter on Icatian Moneychanger. Activate only during your upkeep.

: Target creature gets +1/+1 until end of turn.

First strike; banding (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)

Whenever Icatian Skirmishers attacks, all creatures banded with it gain first strike until end of turn.

Create four 1/1 white Citizen creature tokens.

Enchant creature

Enchanted creature can't attack or block, and its activated abilities can't be activated.

When enchanted creature becomes the target of a spell or ability, destroy Ice Cage.

Whenever a player casts a spell, any other player may pay that spell's mana cost. If a player does, counter the spell. <I>(Mana cost includes color.)</I>

Bargain (You may sacrifice an artifact, enchantment, or token as you cast this spell.)

This spell costs less to cast if it's bargained.

Counter target spell.

Destroy target land.

Iceberg enters the battlefield with X ice counters on it.

: Put an ice counter on Iceberg.

Remove an ice counter from Iceberg: Add .

Whenever Iceberg Titan attacks, you may tap or untap target artifact or creature.

This spell costs less to cast for each snow land you control.

When Icebreaker Kraken enters the battlefield, artifacts and creatures target opponent controls don't untap during that player's next untap step.

Return three snow lands you control to their owner's hand: Return Icebreaker Kraken to its owner's hand.

Flying

When Icefall Regent enters the battlefield, tap target creature an opponent controls. That creature doesn't untap during its controller's untap step for as long as you control Icefall Regent.

Spells your opponents cast that target Icefall Regent cost more to cast.

Flying

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

When Icefeather Aven is turned face up, you may return another target creature to its owner's hand.

: Icehide Troll gets +2/+0 and gains indestructible until end of turn. Tap it. (Damage and effects that say "destroy" don't destroy it. can be paid with one mana from a snow source.)

Protection Fighting Style — When Icewind Stalwart enters the battlefield, exile up to one target non-Warrior creature you control, then return it to the battlefield under its owner's control.

Trample

Remove a ki counter from Ichiga, Who Topples Oaks: Target creature gets +2/+2 until end of turn.

Lifelink

, Exile Ichor Drinker from your graveyard: Incubate 2. Activate only as a sorcery. (Create an Incubator token with two +1/+1 counters on it and ": Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.)

As an additional cost to cast this spell, sacrifice a creature.

All creatures get -X/-X until end of turn, where X is the sacrificed creature's power.

At the beginning of your end step, if an artifact or creature was put into a graveyard from the battlefield this turn, put a +1/+1 counter on Ichor Shade.

Whenever you cast a noncreature spell, put an oil counter on Ichor Synthesizer.

As long as Ichor Synthesizer has four or more oil counters on it, it gets +2/+0 and can't be blocked.

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Whenever Ichorclaw Myr becomes blocked, it gets +2/+2 until end of turn.

Planeswalkers you control have "0: Proliferate" and "–12: Take an extra turn after this one."

Whenever you cast a noncreature spell, choose a counter on target permanent. Put an additional counter of that kind on that permanent.

Deathtouch

Toxic 1 (Players dealt combat damage by this creature also get a poison counter.)

Enchant creature

Enchanted creature loses all abilities and is a blue Fish with base power and toughness 0/1.

Flying, vigilance

When Icingdeath, Frost Tyrant dies, create Icingdeath, Frost Tongue, a legendary white Equipment artifact token with "Equipped creature gets +2/+0," "Whenever equipped creature attacks, tap target creature defending player controls," and equip .

Tap X target creatures.

Ferocious — If you control a creature with power 4 or greater, those creatures don't untap during their controllers' next untap steps.

When Icy Prison enters the battlefield, exile target creature.

At the beginning of your upkeep, sacrifice Icy Prison unless any player pays .

When Icy Prison leaves the battlefield, return the exiled card to the battlefield under its owner's control.

When Idol of Endurance enters the battlefield, exile all creature cards with mana value 3 or less from your graveyard until Idol of Endurance leaves the battlefield.

, : Until end of turn, you may cast a creature spell from among cards exiled with Idol of Endurance without paying its mana cost.

(: Add .)

Idyllic Grange enters the battlefield tapped unless you control three or more other Plains.

When Idyllic Grange enters the battlefield untapped, put a +1/+1 counter on target creature you control.

: Igneous Cur gets +2/+0 until end of turn.

Search your library for up to two planeswalker cards, reveal them, put them into your hand, then shuffle.

At the beginning of your upkeep, Ill-Gotten Inheritance deals 1 damage to each opponent and you gain 1 life.

, Sacrifice Ill-Gotten Inheritance: It deals 4 damage to target opponent and you gain 4 life.

Flash

When Illicit Masquerade enters the battlefield, put an impostor counter on each creature you control.

Whenever a creature you control with an impostor counter on it dies, exile it. Return up to one other target creature card from your graveyard to the battlefield.

Trample

: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.)

Flying

Cumulative upkeep (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.)

Whenever an ability of equipped creature is activated, if it isn't a mana ability, copy that ability. You may choose new targets for the copy.

Equip

: Choose a creature type other than Wall. Target creature becomes that type until end of turn.

Immersturm Skullcairn enters the battlefield tapped.

: Add .

, , Sacrifice Immersturm Skullcairn: It deals 3 damage to target player. That player discards a card. Activate only as a sorcery.

When Imodane's Recruiter enters the battlefield, creatures you control get +1/+0 and gain haste until end of turn.

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

Spells you cast with mana value 6 or greater have cascade.

Whenever a creature enters the battlefield under your control, Impact Tremors deals 1 damage to each opponent.

Impeccable Timing deals 3 damage to target attacking or blocking creature.

Target opponent chooses a creature they control. Destroy that creature.

Whenever Imperial Recovery Unit attacks, return target creature or Vehicle card with mana value 2 or less from your graveyard to your hand.

Crew 2 (Tap any number of creatures you control with total power 2 or more: This Vehicle becomes an artifact creature until end of turn.)