Avatar of Bloodlust

Creatures you control have Bloodthirst 2.
Whenever you assign attackers, if creatures you
control have a total power of twelve or greater, creatures you control gain first strike until end
of turn.
Whether underneath is human, vampire, even a
werewolf, no-one knows. They only know it drinks the
blood of all who oppose it, and such a sight entices its followers to do so.