Kaya, Phantasmal Vindicator

Hexproof, Lifelink, Skulk
At the end of combat on your turn, target
opponent that lost life this turn may pay 3 life. If
that player doesn't, you lose 1 life and draw a card.
Whenever you gain life, you may pay 3 life. If
you do, exile target permanent with CMC X or
less.
"Your debts will be erased by my blade."