Thryx, the Sudden Storm is a uncommon Legendary Creature — Elemental Giant card from Commander Masters (CMM), collector number 127. Current market price: $0.24 (foil $0.30), TCGplayer market prices via Scryfall.
Flash (You may cast this spell any time you could cast an instant.) Flying Spells you cast with mana value 5 or greater cost {1} less to cast and can't be countered.