Gathering of Darkness is a uncommon Sorcery card from The Hobbit (HOB), collector number 68. Current market price: $0.20 (foil $0.30), TCGplayer market prices via Scryfall.
Return up to one target creature card from your graveyard to your hand. Amass Goblins 3. (Put three +1/+1 counters on an Army you control. It's also a Goblin. If you don't control an Army, create a 0/0 black Goblin Army creature token first.)