Scion of Stygia is a common Creature — Tiefling Shaman card from Adventures in the Forgotten Realms (AFR), collector number 70. Current market price: $0.23 (foil $0.10), TCGplayer market prices via Scryfall.
Flash Cone of Cold — When this creature enters, choose target creature an opponent controls, then roll a d20. 1—9 | Tap that creature. 10—20 | Tap that creature. It doesn't untap during its controller's next untap step.