msem-instigator

When Scaleblight Warrior enters, you gain 2 life.
Pay 2 life: Scaleblight Warrior gains menace until end of turn.

Create two 1/1 colorless Samurai creature token. Those creatures gain first strike until end of turn.

Return target spell to its owner's hand. If there are three or more colors among permanents you control, you may counter that spell instead.

Equipped creature has “Whenever this creature attacks or blocks, choose a creature card in your graveyard. This creature gets +X/+Y until end of turn, where X is that card's power and Y is its toughness.”
Equip {2}

When Nephilim Wisdomancer enters, mill three cards. Then you may pay {W}{B}. If you do, return a nonland card from your graveyard to your hand.

Exile target permanent, then return that card to the battlefield under its owner's control.
Draw a card.

{T}: Draw a card, then discard a card.
Whenever you cast an instant or sorcery spell, untap Exchange Scholar.

Return target creature you control and target creature you don't control to their owners' hands. Target player discards a card.
Coalesce {4}{U}{B} (You may cast this from your graveyard for {4}{U}{B}. If you do, it enters as a Horror creature after it resolves. Exile it if it would leave the battlefield or not resolve.)
Terrors of Cuxuri Trench can't block.

Flying
Whenever you attack with two or more creatures with flying, each opponent discards a card.

Return two instant and/or sorcery cards at random from your graveyard to your hand. Exile Thoughts Reborn.

When Jade Counterweight enters, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle.
Equipped creature gets +1/+1.
Equip {1}

Whenever another creature you control enters, you may change Reshaping Primordial's base power and toughness to that creature's power and toughness.

If an effect would create one or more tokens, it creates twice that many of those tokens instead.
If an effect would put one or more counters on a permanent, it puts twice that many of those counters on that permanent instead.

Disgraced 2 (This enters with two -1/-1 counters. Whenever it deals combat damage to a player, remove all -1/-1 counters from it.)
When Branded Contractor dies, you may put its counters on target creature.

Flash
Flying
Menagerie — Whenever Sigilwing Familiar deals combat damage to a player, if there are five or more creature types among creatures you control, draw a card.

Destroy target artifact or enchantment. You gain 4 life.

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.

({T}: Add {U}, {R}, or {W}.)
Ancient Dominion enters tapped.

Equipped creature gets +1/+1 and has vigilance.
Equip {1}

Create three 1/1 red Human creature tokens with haste. Sacrifice those tokens at the beginning of the next end step.
Draw a card.

{2}, Exile Cranial Archive: Target player shuffles their graveyard into their library. Draw a card.

Create a 1/1 white Soldier creature token with vigilance.
At the beginning of combat on your turn, you may pay {2}{W}. If you do, creatures you control get +1/+1 until end of turn.

Riko's Academy enters tapped.
When Riko's Academy enters, you may mill two cards.
{T}: Add {R} or {W}.

Creatures you control have base power 4 and gain trample until end of turn.

Flying
Whenever Literary Lioness deals combat damage to player, draw three cards, then discard two cards.
If you would draw a card while your library has no cards in it, you win the game instead.