Malayeka, Angel of Reprisal

Flying, vigilance, bloodlust, retribution
Thorn X (Whenever this creature is dealt
combat damage by creature, this creature deals X
damage to that creature. X is equal to the number of
+1/+1 counters of this creature.)
Morbid- At the beginning of each end step, if a creature died this turn, you may have this creature fight target creature you do not control.