Vengeful Elf

Lurk {b} ({b}, Exile this creature: At the beginning of your next combat phase, put this creature onto the battlefield tapped and attacking. It can't be blocked until end of turn. Activate this ability only during combat.)
Whenever Vengeful Elf enters the battlefield, target creature gets +1/+1 until end
of turn.

Your attempts to kill me have been in vain.