Gatherer of Essence

When Gatherer of Essence enters the battlefield, exile a Wizard creature card from your graveyard.
{u}{u},{t}: Create a token that's a copy of the card exiled with Gatherer of Essence. Exile it at the beginning of the next end step. Activate this ability only at any time you could cast a sorcery.
Members of the order of the Raven channel the powers of their whole guild, past and present.