Barrowin of Clan Undurr (Showcase) (AFR-336) - Adventures in the Forgotten Realms: (Showcase) Foil

When Barrowin enters, venture into the dungeon. (Enter the first room or advance to the next room.)
Whenever Barrowin attacks, return up to one creature card with mana value 3 or less from your graveyard to the battlefield if you've completed a dungeon.