Dreadhorde Menace

When Dreadhorde Menace enters the battlefield, sacrifice any number of creatures.
For each creature sacrificed this way, put two +1/+1 counters on Dreadhorde Menace.
Dreadhorde Menace enters the battlefield as a copy of
target creature except it has "{b}{r}, Exile a creature card
from a graveyard: Create a 2/2 black zombie with menace."