msem-instigator

Exile target creature, enchantment, or planeswalker. You lose life equal to its mana value.

{2}, Exile a land card from your graveyard: Create a token that's a copy of that land.

Haste
Whenever Emonoru, Ema's Wings attacks alone, he gains flying and double strike until end of turn.

When Parish Slayer enters, create a Weapon token. When you do, attach it to target creature you control. (A Weapon token is an Equipment artifact with “Equipped creature gets +1/+1” and equip {2}.)
{R}: Parish Slayer gains menace until end of turn.

Equipped creature gets +2/+2 and has haste and trample.
Whenever another creature you control dies, sacrifice equipped creature.
Equip {1}

Choose two —
• Target creature you control fights another target creature.
• Exile target artifact.
• Destroy target land. Its controller creates a tapped colorless land token named Lotus Spring with “{T}: Add one mana of any color.”
• Target player returns a land card from their graveyard to their hand.

Exile two target permanents you control, then return them to the battlefield under your control.

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever a creature you control enters, add a quest counter.
1 — You gain 3 life.
2 — Search your library for an Equipment card, reveal it, and put it into your hand. Then shuffle.
3 — You may put an Equipment card from your hand onto the battlefield and attach it to a creature you control.

As an additional cost to cast this spell, you may sacrifice a creature.
Create a 1/1 green Insect creature token. If you sacrificed a creature to cast this spell, create three of those tokens instead.

Frozen Hinterlands enters tapped.
{T}: Add {W} or {B}.
{1}{W}{B}: Until end of turn, Shrouded Rooftops becomes a 3/3 white and black Illusion creature with with lifelink and “Whenever this creature attacks or blocks, torment yourself.” It's still a land. (To torment yourself, lose 3 life unless you discard a card or sacrifice a nonland permanent.)

First strike, trample
Whenever Regal Coralhorn deals combat damage to a player or planeswalker, return target card with a cycling ability from your graveyard to your hand.
Cycling {2} ({2}, Discard this card: Draw a card.)

Thailen's Reprisal deals 2 damage to each of up to X targets.

Whenever a creature attacks you or a planeswalker you control, Pitfall Pangolin gets +1/+0 until end of turn.

As Ocean Monastery enters, you may pay 2 life. If you don't, Ocean Monastery enters tapped.
{T}, Sacrifice Ocean Monastery: Search your library for a Plains or Island card, put it onto the battlefield, then shuffle.

Destroy target creature with power less than or equal to the number of creature cards in your graveyard.

Choose target creature, then choose two —
• Put a +1/+1 counter on the chosen creature.
• The chosen creature gains lifelink until end of turn.
• The chosen creature gains indestructible until end of turn.

Menace
Sacrifice a creature: Devouring Flame gets +2/+0 until end of turn.

Creatures you control get +2/+1 until end of turn. Scry 1.

Up to two target creatures each get +X/+X until end of turn. They must be blocked this turn if able.

Put target nonland permanent on the bottom of its owner's library. You gain life equal to the number of poison counters its owner has.

Enchant creature
Enchanted creature can't attack or block, and its activated abilities can't be activated.

Flash
Flying
When Laughing Bird enters, you may return a creature you control to its owner's hand.

Choose four nonland card names. Target opponent reveals their hand and discards all cards with the chosen names.

Choose two nonland permanent types. Exile each permanent that's at least one of the chosen types.
Flashback {8}{W}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Flying
Improve—{1}{B/R}, Sacrifice a creature. ({1}{B/R}, Sacrifice a creature: Put a +1/+1 counter on this creature. This costs {1} more to activate for each +1/+1 counter on it. Improve only as a sorcery.)
Whenever another creature you control dies, each opponent loses 1 life and you gain 1 life. If that creature was sacrificed, instead each opponent loses 2 life and you gain 2 life.