Vortryx, Waker of the dead

Flying, Trample, Devour 2
Tap {x} untapped creatures you control:
Return target creature card with converted mana
cost {x} or less 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, Waker of the dead dies, exile this permanent and return Vortryx, Waker of the dead to the battlefield tapped".