Spellbound Dragon (ARB) from Alara Reborn, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Jesper Ejsing
• Card Text:
  Flying
  Whenever Spellbound Dragon attacks, draw a card, then discard a card. Spellbound Dragon gets +X/+0 until end of turn, where X is the discarded card's converted mana cost.