msem-instigator

{B}, {T}, Sacrifice Planar Eulogist: Aetherize target creature card in a graveyard. (To aetherize, create a token that's a copy of it, then exile that token.)
{6}{B}: Aetherize target creature card in a graveyard.

Primal—{W}, Exile a creature you control. (During your turn, you may cast this spell by paying {W} and exiling a creature you control instead of playing a land.)
When Planar Eviction enters, exile another target nonland permanent until Planar Eviction leaves the battlefield.

Flying
When Planchette Poltergeist enters, you may exile target creature. Its owner may cast it from exile for as long as it remains exiled.

Aetherize up to two target permanents you control. (To aetherize, create a token that's a copy of it, then exile that token.)

Flying
Whenever Planetary Reconnoiterer attacks, target creature you control gains flying until end of turn.

Sunburst (This enters with a +1/+1 counter on it for each color of mana spent to cast it.)
Sacrifice another artifact: Put a +1/+1 counter on Plasma Enforcer.
When Plasma Enforcer dies, create a 1/1 colorless Servo artifact creature token for each +1/+1 counter on Plasma Enforcer.

Adorned — Plated Valiant gets +2/+2 as long as it's equipped and/or enchanted.

This spell costs {1} less to cast if you cast a spell with a mana payment of exactly {U} this turn. The same is true for {R}.
Once each turn, when you cast a blue or red instant or sorcery spell with mana value 1, you may pay its mana cost. If you do, copy it. You may choose new targets for the copy.

Enchant creature
Enchanted creature can't attack or block, and its activated abilities can't be activated.

Flying
Whenever Pledged Griffin attacks, another target attacking creature gains flying until end of turn.

Alpha (You may have this creature enter with a +1/+1 counter on it. If you do, it becomes alpha and can only attack alone.)
Trample

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever an opponent loses 3 or more life, add a quest counter.
1 — Destroy up to one target creature with power or toughness 2 or less.
2 — Create Sir Jasper Reborn, a legendary 3/1 black Zombie Mouse Knight creature token with menace.
3 — Search your library for a card, reveal it, put it into your hand, then shuffle. If you revealed a card named Karoa's Downfall this way, you may cast it without paying its mana cost.

Equipped creature gets +2/+1 and has flying.
Equip {3}

Whenever Poignant Hydra deals combat damage to a player, put a +1/+1 counter on it.
Creature spells you cast with power less than Poignant Hydra's power cost {1} less to cast.

This spell costs {2} less to cast if you control a creature with power 4 or greater.
Target creature gets +2/+0 and gains first strike and trample until end of turn.

Put two +1/+1 counters on target creature you control. When you do, it deals damage equal to its power to up to one target creature with flying.

Whenever Poised Koi attacks or blocks, look at the top two cards of your library, put any of them into your graveyard, then the rest back on top in any order.

Target creature gains deathtouch and indestructible until end of turn.

Deathtouch
Poisoned Aleud must be blocked if able.

Search your library for a land card and put that card onto the battlefield tapped with a venom counter on it. It gains “Whenever this land is tapped for mana, you lose 1 life.” Then shuffle.

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
When Poisonheart Undead enters, you draw a card and you lose 1 life.

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

When Polgek Restorationist enters, you may return target artifact, enchantment, or planeswalker card from your graveyard to your hand.

Inspired — Whenever Pon's Apprentice becomes untapped, target creature you control has base power and toughness 5/5 until end of turn.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever you cast an instant or sorcery spell, up to one other target creature has base power and toughness 0/2 until end of turn.