Steel Hellkite is a rare Artifact Creature — Dragon card from Commander 2017 (C17), collector number 225. Current market price: $0.31, TCGplayer market prices via Scryfall.
Flying {2}: This creature gets +1/+0 until end of turn. {X}: Destroy each nonland permanent with mana value X whose controller was dealt combat damage by this creature this turn. Activate only once each turn.