msem-instigator

Destroy target attacking creature with mana value 3 or less.

Target creature you control gets +0/+6 until end of turn and can block an additional creature this turn. Untap it.

Flash
When Swift Savior enters, if you control a legendary creature, you may have Swift Savior deal 2 damage to target attacking or blocking creature.

Enchant creature
When Til Death enters, exile target creature an opponent controls other than enchanted creature until Til Death leaves the battlefield.
Enchanted creature has defender.

Creatures you control get +2/+0 until end of turn.
Metamorph {1}{W} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up and cast it at any time for its metamorph cost.)

Vigilance

When Astute Prophet enters, draw a card. If you control a legendary creature, draw two cards instead.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Enchant creature
Enchanted creature doesn't untap during its controller's untap step.
At the beginning of the upkeep of enchanted creature's controller, that player mills a card.

Defender
Sacrifice two Islands: Deepsea Denizen loses defender until end of turn.

Whenever Deluge Crab perseveres, target opponent mills three cards. (A creature perseveres when it survives damage.)

Put target creature into its owner's library third from the top.

Exile target creature. Return that card to the battlefield under its owner's control at the beginning of the next end step.
Metamorph {2}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up and cast it at any time for its metamorph cost.)

Draw four cards.
Metamorph {3}{U}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up and cast it at any time for its metamorph cost.)

{U}: Enduring Rockshell gets -1/+1 until end of turn.
Whenever Enduring Rockshell perseveres, draw a card, then discard a card. (A creature perseveres when it survives damage.)

Flying
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Draw two cards. Each opponent draws a card.

[+1]: Look at the top two cards of your library. Put one of them into your hand and the other into your graveyard.
[–2]: Return target card from your graveyard to the battlefield face down.
[–6]: Turn any number of face-up nonland permanents of your choice face down.

Create two 2/2 blue Drake creature tokens with flying.
Metamorph {1}{U}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up and cast it at any time for its metamorph cost.)

Whenever Kan'Gi, the Reverent perseveres, gain control of target creature an opponent controls with power less than or equal to Kan'Gi's power. (A creature perseveres when it survives damage.)

Each player mills three cards. For each instant and/or sorcery card milled this way, draw a card.

Attacking creatures get -2/-0 until end of turn.
Metamorph {1}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up and cast it at any time for its metamorph cost.)

Flash (You may cast this spell any time you could cast an instant.)
Flying
When Orichi of the Cold Mist enters, exile another target creature you control. Return that card to the battlefield under its owner's control at the beginning of the next end step.

When Paralysis Specialist enters, up to two target creatures don't untap during their controller's next untap step.

Whenever an opponent casts a spell, sacrifice Patient Orchestration. If you do, look at the top X cards of your library, where X is that spell's mana value. Put up to two of them into your hand and the rest on the bottom of your library in any order.