Cazador Szarr, Veiled Tyrant

{1}{b}: Sacrifice a nontoken, non-Vampire creature
you control. If you do, return that creature to the battlefield under its owner's control. It is a Vampire Spawn in addition to its other types.

Bloody Ritual - Sacrifice up to seven other Vampire Spawn you control. Put a +1/+1 counter
on Cazador for each creature sacrificed this way. Activate only as a sorcery and only once per turn.