Khada Jhin, the Virtuoso

At the beginning of each upkeep, create an
artifact token named "Trap" that says
"{2},{t}, sacrifice trap: Destroy target creature
or planeswalker that took damage this turn."
{t}: Sacrifice three "trap" tokens; draw 2 cards
and deal 3 damage to target creature.
Whenever Khada Jhin, the Virtuoso leaves the
battlefield destroy all traps and creatures that
took damage this turn.