msem-instigator

Flying
When Calamity Dragon enters, it deals 2 damage to each creature you don't control. Whenever a creature dealt damage this way dies this turn, Calamity Dragon deals 2 damage to that creature's controller.

Surveil 2, then create a tapped X/X green Mutant creature token, where X is the number of card types among cards in your graveyard.

When Scribal Puppeteer enters, create two 1/1 black Puppet creature tokens with “At the beginning of your upkeep, you lose 1 life.”

Johanna, Skarvith Marshal has first strike as long as it's attacking.
Whenever you attack, you may pay {X}{R/W}{R/W}. When you do, put a +1/+1 counter on each of up to X target attacking creatures. Those creatures gain first strike until end of turn.

When Green Daywalker enters, you may destroy target artifact or enchantment.
Augmented — At the beginning of each end step, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, put a +1/+1 counter on Green Daywalker.

Whenever an opponent casts a spell, that player mills X cards, where X is that spell's mana value.

Discard your hand, then draw three cards. If you spent at least {W}{U}{B}{R}{G} to cast this spell, you may cast any number of cards drawn this way without paying their mana costs.
Exile Face Your Demons.

Palace Hall enters tapped.
When Palace Hall enters, look at the top card of your library. You may put it into your graveyard.
{T}: Add {G} or {W}.

First strike
Whenever Guardian of the Eclipse attacks, you may exile another target attacking creature you control, then return it to the battlefield under your control tapped and attacking.

Eternal Oak gets +1/+1 for each creature you control.
Whenever a nontoken creature you control dies, create a 1/1 green Saproling creature token.

Flying
Soldiers and Knights you control get +1/+1.

Trample
Whenever Saghira, Divinity's Usurper attacks, you may pay {1}{G}. If you do, destroy target artifact, enchantment, or creature with flying.

Zealous Rabble gets +1/+1 for each creature token you control.
At the beginning of your end step, if you're horrific, create a token that's a copy of Zealous Rabble, except it doesn't have this ability. (You're horrific as long as you've sacrificed a permanent or discarded a card this turn.)

At the beginning of your upkeep, choose one —
• You lose 1 life.
• You draw two cards and you lose 3 life.
• Search your library for a card, put it into your hand, then shuffle. You lose 5 life.

Whenever you cast a legendary spell, create a 1/1 white Human creature token.
{W}{U}{B}{R}{G}: Search your library for a legendary card, reveal it, put it into your hand, then shuffle. The next legendary spell you cast this turn costs {W}{U}{B}{R}{G} less to cast.

When Alaina enters, each opponent loses X life and you gain X life, where X is the number of Clerics you control.
{W}{B}, Pay 2 life: Return Alaina from your graveyard to your hand. Activate only if you have more life than your starting life total.

Flying, lifelink
When Timestream Sentinel enters, put two +1/+1 counters on each other creature named Timestream Sentinel you control.

Flying, haste
Whenever Epoch Warden attacks, you may aetherize another target attacking creature you control. (To aetherize, create a token that's a copy of it, then exile that token.)

As an additional cost to cast this spell, pay 1 life.
Departed Evangel can't block.
You may cast Departed Evangel from your graveyard if a creature died this turn.

Vigilance, spirited (When this enters, you may activate one of its activated abilities without paying its costs.)
{T}: Choose artifact or enchantment. Target nonland permanent becomes the chosen type in addition to its other types until end of turn.
Civilized — At the beginning of your end step, if you control an artifact, a creature, and an enchantment, put a +1/+1 counter on target creature you control.

Put a -1/-1 counter on target creature. Target creature you control fights that creature.

Dramatic Peril deals damage equal to the number of lands you control to any target. (Cast a copy of this spell once while this creatures is on the battlefield.)

Menace
Whenever Hope Wrangler attacks, target attacking creature with lesser power gains menace until end of turn.

Shock and Awe deals 2 damage to target creature. Creatures can't block this turn.

Rakkiri Initiate gets +0/+2 as long as it's embattled. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)