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

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

Spellcasting. The Zatweil is a 17th-level spellcaster. Its spellcasting ability is [Intelligence] (spell save DC 23, +15 to hit with spell attacks). The Zatweil has following spells prepared:

Cantrips (at will): acid splash, mage hand, mending, prestidigitation, true strike, dark flare
1st level (4 slots): burning hands, detect magic, magic missile, shield

2nd level (3 slots): blur, invisibility, mirror image

3rd level (3 slots): fireball, lightning bolt, protection from energy

4th level (3 slots): dimension door, stoneskin, wall of fire

5th level (3 slots): cone of cold, passwall, telekinesis

6th level (1 slot): disintegrate, globe of invulnerability

7th level (1 slot): finger of death, [Tooltip Not Found]

8th level (1 slot): sunburst, wall of force

9th level (1 slot): meteor swarm, time stop

Thunderous Slam. Melee Weapon Attack: +19 to hit, reach 10 ft., one target. Hit: 29 (4d10 + 10) bludgeoning damage and the target must make a DC 23 Strength saving throw or be knocked prone.

Shield Bash. Melee Weapon Attack: +19 to hit, reach 5 ft., one target. Hit: 22 (3d8 + 10) bludgeoning damage and the target must make a DC 23 Strength saving throw or be pushed up to 10 feet away from the Zatweil.

Eldritch Cannon Arm: One of the automaton's arms functions as an eldritch cannon. The automaton can activate the cannon as a bonus action and choose one of the following options:

Force Ballista: The automaton creates a ballista-like cannon that fires a bolt of force. The automaton makes a ranged spell attack against a target within 120 ft., dealing 6d8 force damage on a hit.

Flamethrower: The automaton exhales a 30-foot cone of fire. Creatures in the area must make a DC 23 Dexterity saving throw, taking 8d6 fire damage on a failed save, or half as much damage on a successful one.

Lightning Launcher: The automaton creates a launcher that fires a bolt of lightning. The automaton makes a ranged spell attack against a target within 120 ft., dealing 6d10 lightning damage on a hit.

The automaton can use its eldritch cannon once per round.

Eye Beam (Recharge 5-6): The automaton shoots a beam of magical energy from its eyes in a 120 ft. line that is 10 ft. wide. Each creature in the line must make a DC 23 Dexterity saving throw, taking 88 (16d10) force damage on a failed

Eldritch Blast. The Zatweil can use its bonus action to fire a blast of eldritch energy from its cannon at a single target within 120 feet. The attack is a ranged spell attack and deals 33 (6d10) force damage on a hit. The Zatweil can use this ability three times per day.

Shield Bash. The Zatweil can use its bonus action to make a Shield Bash attack (as described in its physical attacks). If the Zatweil has already used its Shield Bash attack as part of its multiattack, it cannot use this bonus action.

Eldritch Overload. When the Zatweil is hit by a ranged spell attack, it can use its reaction to absorb the spell and charge up its eldritch cannon. On its next turn, the Zatweil can use its bonus action to unleash a powerful blast of energy from its cannon, targeting any point within 120 feet. All creatures within a 20-foot-radius sphere centered on that point must make a DC 23 Dexterity saving throw, taking 55 (10d10) force damage on a failed save, or half as much damage on a successful one. Once the Zatweil uses this ability, it cannot use it again until it finishes a long rest.

Thundertone. The Zatweil lets out a low-pitch, deafening tone that shakes the ground, causing all creatures within 30 feet of it to make a DC 23 Constitution saving throw or be stunned until the end of their next turn. The Zatweil can use this action twice per round.

Shield Wall. The Zatweil raises its massive shield, creating a wall of metal that provides cover to itself and all allies within 20 feet of it. The wall has an AC of 28 and 1,000 hit points, and lasts until the end of the Zatweil's next turn. The Zatweil can use this action once per round.

Eldritch Discharge. The Zatweil unleashes a burst of eldritch energy from its cannon, targeting a single creature within 120 feet. The attack is a ranged spell attack and deals 44 (8d10) force damage on a hit. The Zatweil can use this action once per round.