Opal Gargoyle (USG) from Urza's Saga, available at 401 Games Canada.

• Rarity: Common
• Finish: Normal
• Artist: Kev Walker
• Card Text:
  When one of your opponents successfully casts a creature spell, if Opal Gargoyle is an enchantment, Opal Gargoyle becomes a 2/2 creature with flying that counts as a Gargoyle.