Ethereal Arcanist

Whenever Ethereal Arcanist or the enchanted
creature attacks, you may cast an instant or
sorcery spell from your graveyard without
paying it's mana cost.
Enchanted creature gets +4/+4
Bestow {6}{u}{u} (If you cast this card for its bestow
cost, it's an Aura spell with enchant creature. It
becomes a creature again if it's not attached to a
creature.)