msem-instigator

Choose one —
• Draw seven cards.
• End the turn. (Exile all spells and abilities, including this. The player whose turn it is discards down to their max hand size. Damage wears off, and “this turn” and “until end of turn” effects end.)

{R}: Draconic Aspirant gets +1/-1 until end of turn.

At the beginning of each end step, if you've cast a noncreature spell this turn, put a +1/+1 counter on Streetwise Spellseeker. Then if its power is 5 or greater, create a 4/4 white Angel Soldier creature token with flying.

Whenever you foretell a card or cast a foretold spell, each opponent loses 1 life and you gain 1 life.

When Consumption Catalyst enters, create a Vial token. (It's an artifact with “{1}, Sacrifice this and another permanent: Draw a card. Activate only during your turn.”)
Whenever you draw a card, each opponent loses 1 life and you gain 1 life.

Enchant creature
Whenever enchanted creature attacks, up to two target creatures can't block this turn. Up to one target creature blocks this turn if able.

Exile target attacking creature. You get a glory counter. (You lose glory counters before life. A player with ten or more glory counters wins the game.)

Frilled Hydra enters with X +1/+1 counters on it.
Defiance (Whenever this creature takes damage, if it survives and wasn't defiant, put a +1/+1 counter on it and it becomes defiant.)
Frilled Hydra has hexproof as long as it's defiant.

Improve {1} ({1}: Put a +1/+1 counter on this creature. This costs {1} more to activate for each +1/+1 counter on it. Improve only as a sorcery.)
Whenever Ivy Kissinger, Sharpshooter attacks, choose a creature you control. For each kind of counter among creatures you control, you may put a counter of that kind on the chosen creature.

Destroy target artifact or enchantment. You gain 4 life.

First strike
Whenever you cast an instant or sorcery spell, if Branch Breaker dealt combat damage to a player this turn, you may sacrifice Branch Breaker. If you do, copy that spell. You may choose new targets for the copy.

Equipped creature has haste.
At the beginning of combat on your turn, create a token that's a copy of equipped creature, except the token isn't legendary if equipped creature is legendary. That token gains haste. Exile it at the beginning of the next end step.
Equip {2}

Lifelink
Whenever you sacrifice a creature, you gain life equal to its power.

Reach
{3}, Exile Sorrowful Seeker from your hand: Draw a card. You may cast this card for as long as it remains exiled.

When Writhing Gateway enters, you may discard a card. If you do, create a 5/3 black Horror creature token.
{1}{B}{B}, Discard a card: Create a 5/3 black Horror creature token.

Flying
Whenever Haunter of the Deadlands attacks, Spirit creatures you control get +1/+1 until end of turn.

Draw two cards. You may cast an instant or sorcery spell with mana value X or less from your hand without paying its mana cost, where X is the number of cards in your hand.

This spell costs {1} less to cast for each enchantment you control.
Shuffle, then exile cards from the top of your library until you exile three nonland cards. Cast any number of spells from among cards exiled this way without paying their mana cost, then put the rest onto the bottom of your library in a random order.

If a card would be put into your graveyard from anywhere, exile it instead.
If you would draw a card, return two cards from your graveyard to your hand instead. If you can't, you lose the game.

Gain control of target creature until end of turn. Untap it. Until end of turn, it gains haste and “This creature can't be blocked.”
{1}, Discard Cruel Heartbeat: Add one mana of any color. Scry 1.

Whenever another creature dies, you gain 1 life.

You draw two cards, lose 2 life, and mill two cards.

You may pay {1}{R}{R} and exile a red card from your hand rather than pay this spell's mana cost.
Pyretic Cyclone deals 3 damage to each creature.

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

Flying
Whenever Heroes of Wars Past attacks, attacking Human creatures get +1/+1 and gain flying until end of turn.