Malfunction.

Whenever the autognome takes 15 damage or more from a single source and isn't reduced to 0 hit points by that damage, roll a d20 to determine if it suffers a malfunction:

1-10: "All Fine Here!" No malfunction occurs.
11-12: "My Mind Is Going. I Can Feel It." The autognome is incapacitated for 1 minute.
13-14: "You've Disarmed Me!" One of the autognome's arms falls off, reducing the number of Shock attacks it can make by 1 until a creature uses an action to reattach the arm.
15-16: "Who Turned Out the Lights?" The autognome's head falls off and deactivates, causing the autognome to be blinded and deafened until a creature uses an action to reattach the head, which reactivates it.
17-20: "Have a Magical Day!" The autognome explodes and is destroyed. Each creature within 20 feet of the exploding autognome must make a DC 11 Dexterity saving throw, taking 22 (4d10) slashing damage on a failed save, or half as much damage on a successful one.
Unusual Nature. The autognome doesn't require air, food, drink, or sleep.

Actions

Multiattack.

The autognome makes two Shock attacks.

Shock.

Melee or Ranged Weapon Attack: +3 to hit, reach 5 ft. or range 60 ft., one target. Hit: 7 (2d6) lightning damage.

Autognome