name: Opal Acrolith
originalText: Whenever one of your opponents successfully casts a creature spell, if Opal Acrolith is an enchantment, Opal Acrolith becomes a 2/4 creature that counts as a Guardian.\n{0}: Opal Acrolith becomes an enchantment.
printings: USG
text: Whenever an opponent casts a creature spell, if this permanent is an enchantment, it becomes a 2/4 Soldier creature.\n{0}: This permanent becomes an enchantment.
type: Enchantment