'Aeoan Murderbot'

Antimagic Susceptibility. The armor is incapacitated while in the area of an antimagic field. If targeted by dispel magic, the armor must succeed on a Constitution saving throw against the caster’s spell save DC or fall unconscious for 1 minute.

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

Magic Absorption. A spellcaster that casts a spell while within 20 ft. of the Murderbot must make a DC 13 saving throw, the related attribute is determined by the class spellslot used to cast this spell. A warlock spell would require a CHA saving throw, a wizard spell an INT saving throw, and so forth. On a failed saving throw, the spell is absorbed into the Murderbot and the construct heals itself by 1d6 per level of the spellslot used. An absorbed cantrip still heals the construct for 1d6.

Multiattack. The Murderbot makes two melee attacks or uses Light Bolt thrice.

Attached Scytheblades. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) slashing damage plus 3 [rollable](1d6);

Light Bolt. Range 60 ft., up to three targets. Hit: 4 (1d4+1) force damage.

Bolt Burst (Recharge 6). Range 60 ft., every creature within range. DEX saving throw DC 15. Hit: 7 (2d4+2) force damage.

The Murderbot has two legendary actions per turn.

Melee Attack (1 action). The Murderbot makes one melee attack using its Attached Scytheblades.

Ranged Attack (2 actions). The Murderbot uses its Light Bolt attack.