msem-instigator

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

When Blessed Spellroot dies, you gain 5 life.

You may play lands from graveyards.
{9}{G}{G}: Put nine +1/+1 counters on Jirada, Elder of Caulte.

When Radiant Rebuker enters, exile target nonland permanent an opponent controls until Radiant Rebuker leaves the battlefield.

Vigilance, deathtouch
Prevent all damage that would be dealt to Nataila, Raven's Repented while it's attacking or blocking alone.

Equipped creature gets +2/+2.
Art of war — At the beginning of your end step, if equipped creature dealt damage to an opponent this turn, you may return target creature card from your graveyard to your hand.
Equip {2}

Haste
When Challenging Pupil enters, conjure a card named Fatigue and put it on top of your library. (It's a colorless sorcery that costs {2} with “Draw a card.”)

If one or more +1/+1 counters would be put on a creature you control, put that many +1/+1 counters on each creature you control instead.

Paranoia—Exile a creature card from your graveyard. (You may cast this spell for its paranoia cost when a permanent you control leaves the battlefield.)
Equipped creature gets +2/+0.
Equip {1}

Whenever one or more creatures you control deal combat damage to a player, that player discards a card. Then that player may discard another card. If they don't, create two 2/1 black Nightmare creature tokens with “This creature can't block.”
Fleeting {1}{B}{B} (You may cast this spell for its fleeting cost. If you do, sacrifice it at the beginning of the next end step.)

Vigorbreath Scourge enters with X +1/+1 counters on it.
Whenever Vigorbreath Scourge attacks, it gets +X/+X until end of turn, where X is your devotion to green. Then if its power is 6 or greater, draw a card. (Each {G} in the mana costs of permanents you control counts toward your devotion to green.)

Menace

Exile target permanent. Return that card to the battlefield under its owner's control at the beginning of the next end step.

Griffin Country enters with a feather counter on it.
Creatures with flying you control get +1/+1.
{U}, Remove a feather counter from Griffin Country: Put a flying counter on target creature you control.
{2}{U}, Remove a feather counter from Griffin Country: Search your library for a creature card with flying, reveal it, put it into your hand, then shuffle.

Whenever you sacrifice a permanent, you may pay {1}. If you do, you draw a card and you gain 1 life.

Nizev Temple enters tapped.
Satrapies you control have “{T}: Add {U} or {B}.”

Ward {3}
Whenever Operative SPORTY attacks or you cast a blue or black spell, put a +1/+1 counter on Operative SPORTY.

Flash
Flying
When Protector of the City enters, choose target nonland permanent. Counter all activated abilities from that source and it can't attack, block, or activate abilities until Protector of the City leaves the battlefield.

When Spiritual Colpah dies, you may return target creature card from your graveyard to your hand.

Enchant creature
Enchanted creature can't be blocked.
Whenever enchanted creature deals combat damage to a player, you may aetherize it. (To aetherize, create a token that's a copy of it, then exile that token.)

Flying
Whenever Wandering Dragonfly or another creature you control enters, you may draw a card. If you do, discard a card.

Glitch—Discard a card. (Remove one [restriction] for each time you pay the glitch cost.)
Add {R} for each [Mountain] land you control, then exile the top three cards of your library. You may play [one of] those cards this turn.

Pressure {3}{G} (You may cast this spell for its pressure cost if seven or more cards are in your graveyard.)
Put two +1/+1 counters on target creature you control if Way of the Danithra was cast for its pressure cost. Then it fights up to one target creature you don't control.

Whenever Daring Skythief crews a Vehicle, that Vehicle gains flying until end of turn.

Haste
Whenever Emblazoned Qilin attacks, it gains flying until end of turn if it's in a pack. (Two or more creatures you control with equal power are in a pack.)