Demon feast

When you play Demon Feast, sacrifice 1 creature
if you payed {b/r} with black: all demons you
control get +3/+3 and when this creature dies :
create a 2/2 flying red-black pirate creature token
if you payed {b/r} with red: all demons you control
get +4/+2 and whenever this creature attacks: it
gets +2/+0 until end of turn