Clockwork Beholder

Antimagic Cone. The Clockwork Beholder’s central eye creates an area of antimagic, as in the antimagic field spell, in a 150ft cone. At the start of each of its turns, the Clockwork Beholder decides which way the cone faces and whether the cone is active. 

Eye Rays: The Clockwork Beholder makes three of the following magical eye rays at random(roll d6. If a duplicate is rolled, reroll the dice and make a Buzz Saw attack), choosing up to three targets it can see within 120ft of it:

Buzz Saw: Melee weapon attack, +5 to hit, reach 10ft, one target. Hit 13(2d10+2) slashing damage. 

1. Slowing Ray: The targeted creature must succeed on a DC 15 Dexterity saving throw. On a failed save, the target’s speed is halved for 1 minute. In addition, the creature can’t take reactions, and it can take either an action or a bonus action on its turn, not both. The creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
2. Enervation Ray: The targeted creature must make a DC 15 Constitution saving throw, taking 9(2d8) necrotic damage on a failed save, or half as much damage on a successful one.
3. Telekinetic Ray. If the target is a creature, it must succeed on a DC 15 Strength saving throw or the Clockwork Beholder moves it up to 30ft in any direction. It is Restrained by the ray’s telekinetic grip until the start of the Clockwork Beholder’s next turn or until the Clockwork Beholder is Incapacitated. If the target is an object weighing 300 pounds or less that isn’t being worn or carried, it is moved up to 40ft in any direction. The Clockwork Beholder can also exert fine control on objects with this ray, such as manipulating a simple tool or opening a door or a container.
4. Sleep Ray. The targeted creature must succeed on a DC 15 Wisdom saving throw or fall asleep and remain Unconscious for 1 minute. The target awakens if it takes damage or another creature takes an action to wake it. This ray has no effect on constructs and undead.
5. Laser Beam Ray. If the target is a creature, it must succeed on a DC 15 Dexterity saving throw or take 18(4d8) force damage. If this damage reduces the target to 0 hit points, its body becomes a pile of fine gray dust. If the target is a large or smaller nonmagical object or creation of magical force, it is disintegrated without a saving throw. If the target is a huge or smaller object or creation of magical force, the ray disintegrates a 10ft cube of it.
6. Death Ray. The targeted creature must make a DC 15 Dexterity saving throw taking 22(4d10) necrotic damage on a failed save, and half as much on a successful one.

The Clockwork Beholder can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time, and only at the end of another creature’s turn. The Clockwork Beholder regains spent legendary actions at the start of its turn:

Eye Ray. The Clockwork Beholder uses one random Eye Ray.