msem-instigator

{1}{W}: Target creature you control gets +0/+1 until end of turn and assigns combat damage equal to its toughness rather than its power this turn. When that creature deals combat damage to a player this turn, transform Reversal Medic.

{W}: Target creature assigns combat damage equal to its toughness rather than its power this turn.

Prevent all combat damage that would be dealt this turn. Target player sacrifices an attacking creature.

At the beginning of your upkeep, you gain 1 life for each color among permanents you control.
{W}{U}{B}{R}{G}, Sacrifice Sartha's Studies: Double your life total.

Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.)
Artifacts and creatures your opponents control enter tapped.

Street Busker gets +2/+0 as long as you've gained life this turn.

Whenever Talent Scout enters or dies, return target creature card with mana value 2 or less from your graveyard to your hand.

Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.)

{X}{X}{W}, {T}, Sacrifice Tome of Loss: Return each creature card with mana value X or less from your graveyard to the battlefield.

{6}{W}: Tap all creatures target player controls.

Target creature gets +X/+X and gains vigilance until your next turn, where X is the number of creatures you control.

Flying
At the beginning of your end step, untap another target creature you control.

You may activate abilities of nonland permanents your opponents control.

Creatures with power greater than Aspiring Recluse's can't block it.
Whenever Aspiring Recluse deals combat damage to a player, you may pay {2}. If you do, transform it.

Whenever Apex of Augmentation attacks, other creatures you control can't be blocked this turn.

Whenever Babbling Experiment or another creature you control enters, target player mills two cards.

Tap up to four target nonland permanents. Nonland permanents your opponents control don't untap during their controller's next untap step.

Investigate, then counter target spell unless its controller pays {1} for each Clue you control. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)

Whenever Coral Hunter attacks, another target creature can't be blocked this turn.

This spell costs {1} less to cast for each tapped creature your opponents control.
{5}{U}: Evigian Titan can't be blocked this turn.

Return target creature to its owner's hand. Create a 2/2 green Bear Actor creature token.

At the beginning of your upkeep, gain control of up to one target noncreature, nonland permanent for as long as you control Flawless Heist. Then if you control five or more permanents you don't own, you win the game.

Mark (Whenever this creature attacks, mark target creature until end of turn.)
Whenever Gentleman Thief deals combat damage to a player, gain control of target marked creature.

Flash
Flying

Exile target permanent. Return that card to the battlefield under its owner's control at the beginning of the next end step.