Bath of Blood

You may sacrifice one creature you control to
help cast Bath of Blood. When you do, it adds
to X a number equal to its converted mana cost.
Put a target creature card with converted mana
cost X from your graveyard into the battlefield.
Put a +1/+1 counter on it if it is a Vampire.
It gains the Black color if it did not have it.
It gains the Vampire type if it did not have it.