Justin, Demon of Faces

Flying, Trample, Bloodthirst 2
When Justin deals damage to a player if Justin is
an angel and demon transform this creature
{1}{w}{w}: If you control an human Justin becomes
a angel and gets +1/+3 and gains lifelink and first strike until end of turn.
{1}{b}{b}, Sacrifice two humans: Justin becomes a
demon and gets +3/+1 and gains intimidate and
menace until end of turn.