Maya, Vampire Cursed

Lifelink
Sacrifice a Creature: Add three mana of any color
to your mana pool. Gain life equal to the
creature's toughness.
If the sacrificed creature was a human, exile
Maya, Vampire Cursed and return her to the battlefield transformed with loyalty equal to the
life gained.
Even with her drastic transformation, she still smiles
at everyone she knows.