Arlecchino, 4th of The Fatui

Flying, Deathtouch
{t}{b}{r} Target opponent creature and put a
red death token on it. Whenever a creature
with a red death token dies this creature gains
+1/+1.
Black and Red spells cost 1 less for every +1/+1
counter Arlecchino, 4th of The Fatui has.