As a bonus action, the golem targets any creature, object, or magical effect within 10 feet of it. The golem chooses a spell already cast on the target. If the spell is of 3rd level or lower, the golem absorbs the spell and it ends. If the spell is of 4th level or higher, the golem must make a check with a +9 modifier. The DC equals 10 + the spell's level. On a successful check, the golem absorbs the spell and it ends. The golem's body glows when it absorbs a spell, as if under the effect of a light spell. A smaragdine golem can only hold one absorbed spell at a time.