Vahkir's Offspring

Flying
When Vahkir's Offspring enters the battlefield,
you may cast target instant or sorcery from your graveyard until end of turn.
Unearth {b}{r} ({b}{r}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at
the beginning of the next end step or if it would leave
the battlefield. Unearth only as a sorcery.)