msem-instigator

When Graide, Voice of Autumn enters the battlefield, create X 1/1 green Squirrel creature tokens.
Squirrels you control get +1/+0 and have haste.
Nonbasic lands your opponents control enter the battlefield tapped.

If it isn't an extra turn, take an extra turn after this one. (Cast a copy of this spell once while this creature is on the battlefield.)

Until end of turn, target creature gets +2/+0 and gains “When this creature dies, return it to the battlefield tapped under your control.”

Sacrifice another creature: Grisly Rougarou deals damage equal to the sacrificed creature's power to any target.

Other creatures you control that are Knights or have Adventures get +1/+1.

{2}, Sacrifice a creature or artifact: Hadak's Guardian deals 2 damage to any target.

Attacking creatures you control get +1/+0.

Enchant player
Creature tokens enchanted player controls get +1/+1.

When Hand of Consequence enters the battlefield, creatures your opponents control get -1/-1 until end of turn.
At the beginning of your upkeep, if your fealty to Swamps is five or greater, transform Hand of Consequence. (Each Swamp you control counts towards your fealty to Swamps.)

When Hand of Dominion enters the battlefield, tap target creature. It doesn't untap during its controller's next untap step.
At the beginning of your upkeep, if your fealty to Islands is five or greater, transform Hand of Dominion. (Each Island you control counts towards your fealty to Islands.)

When Hand of Fidelity enters the battlefield, creatures you control get +1/+1 until end of turn.
At the beginning of your upkeep, if your fealty to Plains is five or greater, transform Hand of Fidelity. (Each Plains you control counts towards your fealty to Plains.)

When Hand of Fury enters the battlefield, it gets +2/+2 and gains haste until end of turn.
At the beginning of your upkeep, if your fealty to Mountains is five or greater, transform Hand of Fury. (Each Mountain you control counts towards your fealty to Mountains.)

Equipped creature has menace.
Whenever equipped creature attacks, it gets +X/-X until end of turn, where X is a number of your choice less than its toughness.
Equip {2}

Trample
At the beginning of your upkeep, if your fealty to Forests is five or greater, transform Hand of the Harvest. (Each Forest you control counts towards your fealty to Forests.)

Indestructible
Whenever Hannaru the Conqueror attacks, put a +1/+1 counter on each creature you control.

Flying
At the beginning of your precombat main phase, you may put any number of land cards from your hand onto the battlefield, then draw a card for each land put onto the battlefield this way.

Prevent all damage that would be dealt to target player this turn.
Fabled {1}{W}{W}{W} (Then if you cast this for its fabled cost, put it onto the battlefield transformed attached to that player.)

You may activate loyalty abilities of target planeswalker you control an additional time this turn.
Fabled {1}{U}{U} (Then if you cast this for its fabled cost, put it onto the battlefield transformed attached to that planeswalker.)

{W}: Target creature assigns combat damage equal to its toughness rather than its power this turn.

Whenever Haunted Prodigy attacks, you may tap target creature.
Unveil {2}{W}{U} ({2}{W}{U}: Transform this. Unveil only as a sorcery.)

Whenever Haunting Maestro attacks, you may tap or untap up to two target creatures.

Deathtouch
Discard a card: Headless Carriage gains indestructible until end of turn. Tap it.
Ride {2}{B}{B} ({2}{B}{B}: Transform this and attach it to target creature you control without a Steed. Ride only as a sorcery.)

Flying, vigilance, deathtouch, lifelink

Enchant creature
When Heartstrings leaves the battlefield, exile enchanted creature.
Whenever enchanted creature attacks or blocks, exile it at end of combat.

Lifelink