Cainite Frenzy

During your upkeep, put a +1/-1 Frenzy
token on the enchanted creature. Whenever
this creature deals combat damage to
another creature and that creature dies before
the end of turn, remove all Frenzy tokens
from this creature.
Little else is feared more, by friend or foe,
than the frenzy of the Cainite. It is
all-consuming and often only death can stop it.