Petrahydrox is a common Creature — Weird card from Ravnica Remastered (RVR), collector number 209. Current market price: $0.25 (foil $0.12), TCGplayer market prices via Scryfall.
({U/R} can be paid with either {U} or {R}.) When this creature becomes the target of a spell or ability, return this creature to its owner's hand.