Obscur Eternalizer

When Obscur Eternalizer enters the battlefield, you may return up to two cards you own from exile to your graveyard.
Impetuous 3 (When this creature is put into graveyard from play, you may return target creature with converted mana cost 3 or less from your graveyard to the battlefield. It gains haste. Exile it at the beggining of the next end step.)