opal

he's bottomed on opal there.

0: Opal Acrolith becomes an enchantment.

lonely creeks are opal in the dawn, sword-blue in the sun, grayly silver under misty moons.

When one of your opponents successfully casts a creature spell, if Opal Caryatid is an enchantment, Opal Caryatid becomes a 2/2 creature that counts as a Soldier.

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.

The type of stone including: serpentine stone, opal stone, spring stone, African stone, and verdite stone.