msem-instigator

Whenever an opponent casts a spell during your turn, Hunter of Incantations deals 2 damage to that player.

Reach
Deploy 3 (As this enters, you may tap any number of other creatures you control with total power 3 or more.)
When Hunting Company enters deployed, destroy target creature with flying.

Wanderlust — When you cast this spell, you may copy it if you control four or more differently named lands. You may choose new targets for the copy.
Search your library for a creature or land card, reveal it, put it into your hand, then shuffle.

Whenever Hurried Scavenger attacks or blocks, you may mill two cards.
Hurried Scavenger gets +4/+4 as long as you have five or more card types among cards in your graveyard.

Counter target spell. If that spell is countered this way, its owner puts it on the top or bottom of their library instead of into their graveyard.
Each player draws a card.

Hymn of Fury deals 1 damage to each creature, then each creature you control gains haste and double strike until end of turn.

Double the power and toughness of target creature you control until end of turn. It doesn't untap during its controller's next untap step.

Tap up to two target creatures. Those creatures don't untap during their controller's next untap step.

Ice Path enters tapped.
As Ice Path enters, choose a color.
You may spend {C} as though it were mana of the chosen color.
{T}: Add {C}.

You may have Icefang Wurm assign its combat damage as though it weren't blocked.
{4}{G}{G}: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.)

{1}, {T}: Tap target artifact, creature, or land.

Mill two cards, then you may return an instant or sorcery card from your graveyard to your hand.
Acquiesce (If you cast this spell from your hand, exile it as it resolves. When one or more creatures you control deal combat damage to an opponent, you may cast this card from exile without paying its mana cost.)

When Ideologize enters, exile target creature an opponent controls and each other permanent with the same name that player controls. When Ideologize is no longer on the battlefield, return a card exiled with it to the battlefield under its owner's control.

Flying, vigilance, lifelink
Idyllic Pegasus gets +1/+0 for each artifact and/or enchantment you control.

Ifram's Cavalier enters with two additional +1/+1 counters on it if you didn't cast it from your hand.

Desecrate (When this creature enters, you may sacrifice an artifact or land.)
When Igneous Pulverizer desecrates a permanent, destroy target nonland permanent.

Ward—Pay 3 life.
Igniderm enters with three ignition counters on it.
At the beginning of your upkeep, remove an ignition counter from Igniderm. If you can't, sacrifice it.

Vigilance
Once each turn, when you cast an instant, sorcery, or Elemental spell, you may put a +1/+1 counter on Ignited Vanguard.

When Ill-Fated Seer enters, each player sacrifices a creature. If they can't, Ill-Fated Seer deals 3 damage to them.
Revive {2}{B}{R} ({2}{B}{R}, Exile this card from your graveyard: Create a token that's a copy of this card, except it has no mana cost. Activate only as a sorcery.)

Flying
When Illuminating Archangel enters, target creature gets +X/+X and gains vigilance and first strike until end of turn, where X is the number of permanents you control that are Angels, Demons, Faeries, and/or Spirits.

Whenever Illumination Savant attacks, harmonize. (Trigger up to one harmony of a permanent you control.)
Harmony — Put a +1/+1 counter on each artifact creature and enchantment creature you control.

Flash
Trample

When Illustrious Lantern enters, put a +1/+1 counter on target creature you control.
{4}, {T}: Put a +1/+1 counter on target creature you control.

(Activate each submodule once as a sorcery. When this enters, activate one submodule for free.)
{4}{U}: Thinking
Conjure three cards named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)
{4}{R}: Dreaming
Discard any number of cards, then draw that many cards and add that much {R}.
{3}{U}{R}: Feeling
Imagination Module gains “Whenever you discard a card, exile the top card of your library. You may play it until the end of your next turn.”

You may have Imaginative Dreamer enter as a copy of any creature on the battlefield. When it does, it stops being a copy.