Eissi, Naga Warlock

Eminence - Whenever you sacrifice a creature, if
Eissi, Naga Warlock is in the command zone or
on the battlefield, you may return target nonland
card with converted mana cost less than the
permanent sacrificed from your graveyard to the
battlefield.
{b/g}{u/r}{t}, Sacrifice another creature: Destroy target nonland permanent. If the permanent was a creature, you may discard a card.