
When an opponent casts a creature spell, if this permanent is an enchantment, this enchantment becomes a 3/4 Gargoyle creature with flying and protection from red.
Opal Guardian has 1 printing, first in Time Spiral (2006). EDHREC ranks it #31,013 among Commander cards. It has 4 official rulings.
Cards that show up in the same decks on EDHREC.