Spe-Akof the Devil

Whenever a devil enters the battlefield under
your control, you may put Spe-Akof the Devil from your graveyard or command zone onto the battlefield. It gains haste. Exile Spe-Akof the Devil at the beginning of your next end step.
Whenever Spe-Akof the Devil attacks, you may
put a Devil card from your graveyard onto the battlefield.