msem-instigator

At the beginning of your declare attackers step, create a 0/1 white Cat creature token that's tapped and attacking. Exile that token at the beginning of the next end step.

{2}, {T}: You gain life equal to the number of colors among cards in your graveyard.
{W}{U}{B}{R}{G}: Transform Performer of Enlightenment.

Performer of Winds can't be blocked.
When Performer of Winds enters, remove a counter from up to one target permanent you control.

{T}: Add {C}.
{1}, {T}, Sacrifice Perilous Passage: Destroy target nonbasic land. Activate only if an opponent controls four or more lands.

Perish Song enters with three time counters on it.
At the beginning of your upkeep, remove a time counter from Perish Song. Then if it has no time counters on it, sacrifice it and destroy all creatures.

Deathtouch
When Pestilent Scavenger enters, you may mill three cards.

Petal Blade deals 2 damage to target attacking or blocking creature. Create a Treasure token.

Colossal 2—{1}{G}{G} (You may cast this for its colossal cost to have it enter with two +1/+1 counters; or pay {1}{G}{G} as a sorcery: Put two +1/+1 counters on it if it has none.)
Whenever a permanent you control with a counter on it becomes the target of a spell or ability an opponent controls, draw a card.

Flying
Whenever Phantasmal Owl attacks, it gets +1/+1 until end of turn for each other creature you control with flying.

Deathtouch
Whenever Phantasmal Stalker deals damage to a planeswalker, destroy it.

Whenever a source you control deals damage to an opponent this turn, exile the top card of your library. You may play it this turn.

{T}, Sacrifice Phosphorescent Ravine: Search your library for an Island or Swamp card and put it onto the battlefield tapped, then shuffle.

Choose one —
• Counter target spell unless its controller pays {X}.
• Counter target spell with mana value X.

Adjudicate, then target creature gets +1/+1 until end of turn for each Aura you control. (Create a white Aura enchantment token with enchant creature and “Sacrifice this token: Untap enchanted creature” attached to target creature.)

Pillar of Flame deals 2 damage to any target. If a creature dealt damage this way would die this turn, exile it instead.

Choose highest or lowest. Target opponent reveals their hand and discards a card with the chosen kind of mana value among the revealed nonland cards.

{T}: Target player exiles a card from their graveyard.
{1}, Exile Pinnacle of Purity: Exile all graveyards. Search your library for a basic land card, reveal it, put it into your hand, then shuffle.

Lifelink

When Pious Flutist enters, 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.”)

Enchant player
Whenever a creature enters under enchanted player's control, they lose 1 life.

{T}: Add {C}.
{3}, {T}: Draw a card. Activate only if a creature died this turn.

Target opponent reveals their hand. You choose a creature card from it and exile that card.
Ferocious — If you control a creature with power 4 or greater, instead choose a nonland card from their hand and exile that card.

Vigilance, deathtouch, menace

Equipped creature can't have -1/-1 counters put on it.
Equip {1}