msem-instigator

When Fox of the Molten Dawn enters, you may return target Aura card with mana value 3 or less from your graveyard to the battlefield attached to a permanent it could enchant.

Whenever Fox of the Mushroom Forest enters or deals combat damage to a player, its activated abilities cost {W} less to activate until your next turn.
{W}, Sacrifice Fox of the Mushroom Forest: Counter target noncreature spell unless its controller pays {2}.

When Fox of the Sunset Legion enters, create two 1/1 white Fox Spirit creature tokens.

Whenever an enchantment you control enters, put a +1/+1 counter on Freeborn Healer.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)
Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)

Flash
When Frontier Paragon enters, untap all creatures you control.

{1}{W}: Exile Furtive Witch. If you do, exile another target nonland permanent. Return both of those cards to the battlefield at the beginning of the next end step under their owners' control.

When Gilded Merrow enters, if an opponent controls more lands than you, create a Treasure token. (It's an artifact with “{T}, Sacrifice this permanent: Add one mana of any color.”)

Creature cards can't leave the graveyard or exile.
Players can't cast spells from graveyards or from exile.

Flying
Whenever Granter of Weariness enters or attacks, you may tap target creature if its power is less than or equal to the number of Elementals you control.

Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.)

Whenever Guided Medic attacks, upgrade it. (Give it one of the listed counters it doesn't already have.)
• +1/+1
• Lifelink

No more than one creature can attack each combat.
No more than one creature can block each combat.

Survivors you control have vigilance.

When Hand of Fidelity enters, 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.)

Flying
Whenever Haunter of the Deadlands attacks, Spirit creatures you control get +1/+1 until end of turn.

Whenever Herald of Heroes deals combat damage to a player, reveal the top five cards of your library. You may put a creature card with power 2 or less from among them into your hand. Put the rest on the bottom of your library in any order.

When Herald of Teardrops enters, choose one. If you control another Elemental, you may choose both instead.
• Create a 1/1 blue Elemental creature token with flying.
• Put a +1/+1 counter on each of up to two creatures.

Vigilance
Creature spells you cast cost {2} less to cast.
Other creatures you control can't attack or block.

Flying, lifelink

Vigilance
Menagerie — When Hoof Cliff Trihorn enters, if there are five or more creature types among creatures you control, you may search your library for a card named Hoof Cliff Trihorn, reveal it, put it into your hand, then shuffle.

Advance {2}{W} (Cast this for {2}{W} to advance it as it enters. {2}{W}: Advance this as a sorcery.)
Whenever Hoverstepper advances, target creature gets +1/+1 and gains flying until end of turn.

Advance {3}{W} (Cast this for {3}{W} to advance it as it enters. {3}{W}: Advance this as a sorcery.)
Whenever Hrexa Enforcer advances, put a +1/+1 counter on it.

Vigilance
When Huolin Sanctifier dies, if it was in a pack, create a 2/1 black Spirit creature token with “This creature can't block.” (Two or more creatures you control with equal power are in a pack.)

First strike
When Imperial Dragoon enters, target creature gets +2/+0 until end of turn.