msem-instigator

You may put a creature card from your hand onto the battlefield. That creature gains haste. Sacrifice that creature at the beginning of the next end step.

Each player exiles up to X cards from their graveyard. Then each player loses life, discards cards and sacrifice creatures equal to X minus the number of cards that player exiled this way.

You have no maximum hand size.
At the beginning of your upkeep, draw a card.
At the beginning of your end step, you lose 1 life for each card in your hand.

Vigilance
When Illari, Martyrized Tyrant enters, tap all other nonbasic permanents.
Players can't untap more than one nonbasic permanent during each of their untap steps.
When Illari dies, untap all permanents you control and you gain 5 life.

Choose a card in your graveyard. Search your library for a card with the same name as that card, reveal it, put it into your hand, then shuffle.

Flying
Illuminated Firebird can't block.
Foresight — Whenever you draw your second card each turn, return Illuminated Firebird from your graveyard to the battlefield.

You may have Illusion of the Div enter as a copy of any creature you control except it has “{G}{U}{B}, Discard a card: Create a tapped token that is a copy of this creature.”

Flying
When Illusionary Steed becomes the target of a spell or ability, sacrifice it.

{G}: Exile target card from a graveyard. If a creature card with flying is exiled this way, put a flying counter on Illustrious Qilin. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance.

Flash
Whenever you make first contact, you may put a card you own from outside the game into your hand. (You make first contact the first time each turn you cast a spell with a name not in your graveyard or control already.)

Whenever you tap an artifact or land for mana, add one mana of any type that permanent produced.

Shuffle any number of cards from your graveyard into your library.
Scry 1, then draw a card.

Whenever Imako, Ninefingers becomes tapped, exile the top three cards of target opponent's library face down.
You may look at cards exiled with Imako.
Sacrifice Imako: Turn all cards exiled with it face up. Exile all cards with those names from your opponent's graveyards.

Vigilance
Imisti's Commando can't be blocked by creatures with lesser power.
Whenever Imisti's Commando deals combat damage to a player, draw a card.

Whenever Imisti, Elven Insurgent attacks, mill two cards. When you do, you may return target land card from your graveyard to your hand.
{X}{B}{G}: If Imisti has no +1/+1 counters on it, put X +1/+1 counters on Imisti. Activate only as a sorcery.

Imitator of Drakes has flying as long as it has a +1/+1 counter on it.
{2}{U}: Put a +1/+1 counter on Imitator of Drakes.

Immolated Grave enters tapped.
{T}: Add {R}.
{2/R}{2/R}: Immolated Grave becomes a 3/1 red Elemental creature with first strike until end of turn. It's still a land.

Hexproof, indestructible
You don't lose the game for having 0 or less life.
For each 1 life you would lose while you have 0 or less life, instead put a -1/-1 counter on a creature you control with toughness 1 or greater.

Exile target creature card from a graveyard. Create a token that's a copy of that creature, except it's a colorless artifact. (It's not a creature.)

As an additional cost to cast this spell, discard a nonland card.
All creatures get -X/-X until end of turn, where X is the discarded card's mana value.

Flying
When Imperator Namuzzar enters, search your library for an artifact or enchantment card, reveal it, put it into your hand, then shuffle.
Civilized — Lammasu you control get +2/+2 and have hexproof as long as you control an artifact, a creature, and an enchantment.

First strike, vigilance
Partner with Commander Hyctaleon (When this creature enters, target player may put Commander Hyctaleon into their hand from their library, then shuffle.)
At the beginning of your upkeep, you may search your library for a Soldier card, reveal it, put it into your hand, then shuffle.

As Imperial Barracks enters, you may reveal a Mountain or Plains card from your hand. If you don't, Imperial Barracks enters tapped.
{T}: Add {R} or {W}.

{T}: Add {C}.
{4}, {T}, Put a -1/-1 counter on a creature you control: Draw a card.

Exile target artifact or enchantment. Its controller creates a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)