msem-instigator

Whenever Melodious Musician attacks, tap target creature an opponent controls.

This spell costs {1} less to cast if you control a Warrior.

Menace
Ferocious — Whenever Merciless Xun Huang attacks, if you control a creature with power 4 or greater, defending player sacrifices a permanent.

When Miasma Spewer enters the battlefield, you may sacrifice a permanent. When you do, Miasma Spewer deals 1 damage to each opponent and each creature and planeswalker they control.

Look at the top two cards of your library. You may shuffle.
Draw two cards. You lose 2 life.

Flash

Ferocious — Whenever a creature with power 4 or greater enters the battlefield under your control, Mieng, Who Dances With Dragons becomes a 4/4 Dragon creature with flying until end of turn.

Enchant player
Enchanted player's maximum hand size is reduced by two.

Flying
When Mirin, Held by the Heavens dies, if your life total is less than 10, it becomes 10.

Create a token that's a copy of target creature you control.
Fabled {5}{U}{U} (Then if you cast this for its fabled cost, put it onto the battlefield transformed attached to that creature.)

{T}: You may put a creature card with mana value 2 from your hand onto the battlefield.

Monumental Siege deals 5 damage divided as you choose among any number of targets. Whenever a creature dealt damage this way this turn dies, create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)

{1}{B}, Pay 2 life: Moonlight Butcher gains menace until end of turn.

Moonlight Curator has flying as long as it's embattled. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)

Moonlight Stag has vigilance as long as it has a +1/+1 counter on it.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever you cast a noncreature spell, each opponent loses life equal to Morose Harpist's power.

Return target creature card with mana value 3 or less from your graveyard to the battlefield.
Fabled {4}{W}{W} (Then if you cast this for its fabled cost, put it onto the battlefield transformed attached to that creature.)

Flying
Whenever another creature enters the battlefield under your control, you gain 1 life.

Flying
When Mother of Owls dies, you may return target creature an opponent controls to its owner's hand.

{4}{G}: Monstrosity 2. (If this creature isn't monstrous, put two +1/+1 counters on it and it becomes monstrous.)
When Mountain Bighorn becomes monstrous, you may have it fight target creature you don't control.

Look at the top three cards of your library, then put them into your graveyard or back on top of your library in any order.
Draw two cards.

Enchant creature
Whenever enchanted creature attacks, it gets +3/+3 and gains trample until end of turn.

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

When Naiad of the Glen enters the battlefield, create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)
Naiad of the Glen has trample as long as it has a +1/+1 counter on it.