Another robot from The Avenger (my 5e conversion of the ship/mega-dungeon in Expedition to the Barrier Peaks). A recent encounter with my kids had them being thrown out the airlock with a maximised gargantuan bullette in tow.
Huge Construct (robot), unaligned
Armour Class 14 (skymetal chasis)
Hit Points 147 (14d12 + 56)
Speed 20 ft.
STR 20 (+5) DEX 9 (-1) CON 18 (+4)
INT 10 (+0) WIS 8 (-1) CHA 10 (+0)
Damage Resistances bludgeoning, piercing, and slashing from nonmagical weapons that aren’t adamantine.
Damage Immunities force, necrotic, poison, psychic
Damage Vulnerabilities electrical
Condition Immunities charmed, frightened, paralysed, petrified, poisoned, stunned
Senses Darkvision 60 ft., passive Perception 9
Challenge 9 (5,000)
Gift of the Machine God. As a creature of technology robots gain many damage and condition residences and immunities but they are also susceptible to electrical attacks.
Magic Resistance. The golem has advantage on saving throws against spells and other magical effects.
Repair Robot. As an action that does not provoke an attack of opportunity, a robot can repair damage dealt to either itself or an adjacent robot, healing the target of 1d10 points of damage
Self-repairing. The robots nanites repair the robot continuously. It heals for 2 hit points per turn until returned to full hit points.
Multiattack. The worker robot can makes two machine slam attacks.
Machine Slam. Melee Natural Weapon Attack: +8 to hit, reach 10 ft.; one target.
Hit: 16 (2d10 +5) bludgeoning damage. If the target is Large or smaller, it is also restrained until this grapple ends (escape DC 16). When the worker robot moves, any Large or smaller target it is grappling moves with it.
Tractor Beam. Worker robots are fitted with a heavy-duty tractor and repulser beams. This acts as the telekinesis spell (PHB pg. 280) with a DC of 16.
Used for loading and unloading cargo and other heavy duty duties this huge robot is a non-combat model. However, its sheer bulk and size makes it a dangerous, albeit clumsy, opponent.