Gix's Caress is a common Sorcery card from The Brothers' War (BRO), collector number 96. Current market price: $0.08 (foil $0.20), TCGplayer market prices via Scryfall.
Target opponent reveals their hand. You choose a nonland card from it. That player discards that card. Create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.")