Opal Archangel (USG) #23 [EN/N]

{4}{W} · Enchantment · When an opponent casts a creature spell, if this permanent is an enchantment, it becomes a 5/5 Angel creature with flying and vigilance. · Illustrated by Jeff Miracola · Urza's Saga #23 · EDHREC rank 29198 · Magic: The Gathering, MTG