Mask of Riddles is a uncommon Artifact — Equipment card from Alara Reborn (ARB), collector number 25. Current market price: $0.52 (foil $5.04), TCGplayer market prices via Scryfall.
Equipped creature has fear. (It can't be blocked except by artifact creatures and/or black creatures.) Whenever equipped creature deals combat damage to a player, you may draw a card. Equip {2}