Yennette, the Scarlet Night

First strike, lifelink, menace

Whenever a creature deals combat damage to one of your opponents, that creature's controller may pay 2 life. If they do, they put a +1/+1 counter on that creature and scry 1.

At the beginning of each opponent's upkeep, that player loses one life for each modified permanent they control.

Pay X life: Attach target aura or equipment you control
with mana value X or less to target permanent or player.