Opal Acrolith (USG) (#22)

Name: Opal Acrolith
Mana Cost: {2}{W}
Type: Enchantment
Collector Number: 22
Oracle Text: Whenever an opponent casts a creature spell, if Opal Acrolith is an enchantment, Opal Acrolith becomes a 2/4 Soldier creature. {0}: Opal Acrolith becomes an enchantment.
Rarity: uncommon
Artist: Robh Ruppel