Victor, Rash Necromancer

When Victor enters the battlefield, if {w} was
spent to cast it, you may sacrifice a creature. If
you do, create X 2/2 blue Zombie creature
tokens, where X is that creature's toughness.
When Victor enters the battlefield, if {b} was
spent to cast it, you may return target creature
card from your graveyard to the battlefield.
{t}, Sacrifice a creature: Target creature
gains hexproof until end of turn.