Steel Hellkite (CM2) from Commander Anthology Volume II, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: James Paick
• Card Text:
  Flying
  2: Steel Hellkite gets +1/+0 until end of turn.
  X: Destroy each nonland permanent with converted mana cost X whose controller was dealt combat damage by Steel Hellkite this turn. Activate this ability only once each turn.