Medium construct (robot, shapechanger), neutral

Armor Class 15 (liquid metal)
Hit Points 52 (8d8 + 16)
Speed 30 ft.

11 (+0) 18 (+4) 14 (+2) 11 (+0) 12 (+1) 14 (+2)

Skills Deception +6, Insight +3, Perception +5
Damage Immunities poison, psychic; bludgeoning, piercing, and slashing from nonmagical attacks that aren’t skymetal (adamantine)
Damage Vulnerabilities fire, lightning
Condition Immunities charmed, exhaustion, frightened, paralyzed, petrified, poisoned
Senses Darkvision 60 ft., passive Perception 15
Languages Common, and any required language to complete his mission
Challenge 3 (700 XP)


  • Adaptive Knowledge. Automatically gains a proficiency or feat as needed though it can only have one new ability active at any given time. It does this as part of a short rest, downloading the knowledge it needs to finish a mission at hand.
  • Ambusher. The robot has advantage on attack rolls against any creature it has surprised.
  • Amorphous. The robot can move through a space as narrow as 1 inch wide without squeezing.
  • Exceptional Senses. A bounty collector has advantage on Wisdom (Perception) checks that rely on sight or sound and has double proficiency bonus in the Perception skill as it constantly scans its surroundings for danger.
  • Reanimation Protocols. The robot regains 10 hit points at the start of its turn if it has fewer than half its hit points but at least 1 hit point.
  • Sensitive Electronics. A bounty collector has disadvantage on saving throws against attacks that do lightning damage and on a natural 1 are stunned until the end of its next turn.
  • Shapechanger. The robot can use its action to polymorph into a Small or Medium humanoid it has seen, or back into its true form. Its statistics, other than its size, are the same in each form. Any equipment it is wearing or carrying isn’t transformed. It reverts to its true form – a puddle of silver metal – if it dies.
  • Surprise Attack. If the robot surprises a creature, or the creature is frightened, and hits it with an attack, the target takes an extra 10 (3d6) damage from the attack.


  • Multiattack. The robot makes two melee attacks.
  • Liquid-State Slash-Slam. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 7 (1d6 + 4) bludgeoning, piercing or slashing damage (robot’s choice).
  • Quantum State Predicative Algorithms. The robot psionically reads the surface thoughts of one creature within 60 feet of it. The effect can penetrate barriers, but 3 feet of wood or dirt, 2 feet of stone, 2 inches of metal, or a thin sheet of lead blocks it. While the target is in range, the robot can continue reading its thoughts, as long as the robot’s concentration isn’t broken (as if concentrating on a spell). While reading the target’s mind, the robot has advantage on Wisdom (Insight) and Charisma (Deception, Intimidation, and Persuasion) checks against the target.


  • Reflected Visage. The robot can use its reaction to being hit by a creature to change its face to an exact copy of the triggering attacker. When this happens, any creature who sees the robot when they are within 30 feet of it must succeed on a DC 15 Wisdom save or be frightened until the end of the targets next turn. A creature that succeeds on their save cannot be affected by this ability for 24 hours.


Alter-Ego, also known as liquid state robots, are built to be infiltrators, spies and assassins. They can change shape and quickly adopt the persona of the target they are impersonating.

Liquid state robots can come in any size; however, Medium is the standard for infiltration models as opposed to combat models.

Alter-egos outwardly resemble androids, because they are visually indistinguishable from the creatures they impersonate, but they contain no organic tissue. Instead, their bodies are made up of a liquid metal alloy, which can be controlled and shaped by its CPU core by applying electrical and magnetic fields. The robot’s movement can be controlled by manipulating the shape of the liquid metal, allowing it to flow and move in a fluid-like manner, or, more practically, mimic a target’s features perfectly.

Section 15: Copyright Notice

Mechanical Monsters (5E) © 2023, Legendary Games; Authors: Jason Nelson, Miguel Colon, Robert J. Grady, Nicholas Hite, Matt Kimmel, Michael Mifsud, James-Levi Cooke, Dan Dillon, Mike Myler, Ismael Alvarez, Jeff Lee, John Lynch.

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