Multiattack

The golem makes two slam attacks.

Slam

Melee Weapon Attack: +12 to hit, reach 5 ft., one target. Hit: 25 (4d8 + 7) bludgeoning damage.

Release Spell

The golem can release an absorbed spell effect as a blast of green energy, which blasts out as a sphere centered on the golem with a radius of 10 feet per level of the absorbed spell. All creatures in the area of effect other than the golem takes 7 (2d6) lightning damage per level of the absorbed spell, or half damage with a successful DC 18 Dexterity saving throw. Creatures that fail the saving throw are also blinded until the end of the golem's next turn.