Vortryx, Bringer of Undeath

Flying, Trample, Devour 2
Tap and sacrifice {x} creatures:
Return target creature with converted mana cost {x} from your graveyard to the battlefield tapped.
{b/g}{b/g}, sacrifice another creature: Put a Phylactery counter on a nonland permanent you control.
That permanent gains
"If Vortryx, Bringer of Undeath dies, exile this permanent and return
Vortryx, Bringer of Undeath to the battlefield
tapped."