msem-instigator

Trample

Search target player's library for a card and exile it. Then that player shuffles.

When Blood Jade Prophet enters, reveal the top three cards of your library. For each card revealed this way, you may pay 3 life. If you do, put that card into your hand. Otherwise, put it into your graveyard.

Spectral Salvo deals 13 damage to target tapped creature. Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Creatures you control get +2/+1 until end of turn. Embattled creatures you control gain vigilance until end of turn. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)

Target permanent phases out. (Then exile this card. You may cast the artifact later from exile.)

Art of war — At the beginning of your end step, if Raiun Bay Scourge dealt damage to an opponent this turn, gain control of target artifact or enchantment until Raiun Bay Scourge leaves the battlefield.

This spell can't be countered.
Polis's Demise deals 5 damage to each creature. Destroy all artifacts.

{1}{B}, Sacrifice another creature: Draw a card and 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.”)
{2}{B}, Sacrifice three Idols: Return Demon of Hubris from your graveyard to the battlefield. Activate only as a sorcery.

Deathtouch

Whenever Orphan Prodigy is dealt damage, it deals that much damage to target player.
Attain {4}{R} ({4}{R}: Transform this. Spend at least three colors of mana to activate this, and only as a sorcery.)

Chronicle (As this enters and after your draw step, add a lore counter. Stop after III.)
[Lore I-II] Each player loses 1 life.
[Lore III] Create a 1/1 black Harpy creature token with flying.

Haste
Spirited (When this creature enters, you may activate one of its activated abilities without paying its cost.)
{1}{R}: Akaima Rager gets +1/+0 until end of turn.

{T}: Add {C}.
{2}, {T}: Add three mana of any one color.
{3}, {T}: Create a colorless artifact token named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”

{8}: Exile target nonbasic permanent. Its controller gains life equal to its mana value.

Flying
Eyes of Cyrukan can't block.

Flying
When Windrider Elemental enters, target creature gains flying until end of turn.

When Forgotten Wretch enters, you may sacrifice another creature. If you do, draw a card.

Whenever another creature named Chef's Apprentice you control enters, target player mills three cards.

When Monastery Scribe enters, return target instant or sorcery card from your graveyard to your hand.

Destroy target nonbasic land.

This spell costs {1} less to cast for each planeswalker you control.
[+2]: Create a 2/2 colorless Spirit creature token.
[–3]: Double the number of each kind of counter on another target permanent.
[–9]: You get an emblem with “The ‘legend rule' doesn't apply to creatures and planeswalkers you control.”

When Haunted Heirloom dies, create a Treasure token.

Deathtouch
Breach (Whenever this deals combat damage to a player, you may have it become an Aura Curse until your next turn. Attach it to that player.)
Whenever an opponent has less life or fewer cards in their main library than the number of Curses attached to them, they lose the game.

Whenever a permanent you control becomes tapped, Storm Servant gets +1/+1 until end of turn.