Bronzework Golem

Immutable Form. The golem is immune to any spell or effect that would alter its form.

Magic Resistance. The golem has advantage on saving throws against spells and other magical effects.

Magic Weapons. The golem's weapon attacks are magical.

Antimagic Cone. The bronzework golem's spell cannon creates an area of antimagic, as in the antimagic field spell, in a 60-foot-cone. At the start of each of its turns, the bronzework golem decides which way the cone faces and whether the cone is active. The area works against the bronzework golem's own cannon spells.

Alternative to Hit Points. As an alternate to using hit points to take down this creature, the DM may choose to have players try to destroy the amount of active crystals that power the golem. By default, the golem would have 1d8+2 crystals that would need to be destroyed. Each crystal has 10 hit points and can only be destroyed if the creature attacking it is grappling/climbing the golem. Any time a crystal is destroyed all players within 5 feet of the golem are pushed back by a powerful shockwave and the Golem activates its fire shield for 1 round.

Multiattack. The golem makes two slam attacks.

Slam. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 19 (3d8 + 6) bludgeoning damage.

Lightning Bolt. A stroke of lightning forming a line of 100 feet long and 5 feet wide blasts out from the bronzework golem's spell cannon. Each creature in the line must make a DC 17 Dexterity saving throw. A creature takes 8d6 lightning damage on a failed save, or half as much damage on a successful one.

Cone of Cold. A blast of cold air erupts from the bronzework golem's spell cannon. Each creature in a 60-foot cone must make a Constitution saving throw. A creature takes 8d8 cold damage on a failed save, or half as much damage on a successful one. A creature killed by this spell becomes a frozen statue until it thaws.

Fire Shield. Thin and wispy flames wreathe the bronzework golem's body for the duration, shedding bright light in a 10-foot radius and dim light for an additional 10 feet. You can end the spell early by using an action to dismiss it.

While active, creatures within 10 feet of the bronzework golem take 2d6 fire damage on each of their turns and are ignited in flames.