Toth-Amon's Voidspawn

Protection from white, blue, black and red
permanents (This creature can't be blocked,
targeted, dealt damage, enchanted, or equipped
by white, blue, black, or red permanents.)
{b}{b}{r}{r}, Sacrifice another creature:
Toth-Amon's Voidspawn gets +X/+X until
end of turn, where X is that creature's power.