Opal Gargoyle - Urza's Saga #25

Opal Gargoyle

Set: Urza's Saga (USG)
Collector Number: 25
Type: Enchantment
Rarity: Common
Mana Value: 2.0

When an opponent casts a creature spell, if this permanent is an enchantment, it becomes a 2/2 Gargoyle creature with flying.