Doomwatch Brass Golem

Armor Class: 3 or 0 [16 or 19]
Hit Dice: 9
Attacks: 4 hand attacks of 1d6+2 or 4 weapon attacks
Saving Throw: 6
Special: Facial mimicry, Electrocution, Weapon Rebound
Move: 9
Challenge Level/XP: 12/2,000

(S&W stats; OSRIC stats may be found in Monsters of Myth from which the text is taken and modified)

A brass golem appears as a metal humanoid figure with an amorphous face and four arms. It typically wears the livery of its master, though it may be dressed in other
fashions.

Once in combat, the golem’s face takes on the smiling appearance of its opponent thus causing the opponent to make a save vs spells or suffer a –2 to hit due to being unnerved at the sight for 1d2 rounds. The golem attacks with all four arms upon an opponent, and may wield weapons (25% chance for each golem encountered) or
attack barehanded. It may focus all four attacks on one opponent or divide them among multiple targets.

If the golem successfully hits one opponent with all four free hand attacks, it may deliver an electrical charge to its victim inflicting 3d6 HP of damage (save vs rods for half). It may do this every combat round.

Once every 10 rounds, the golem may harden its metal and increase its AC to 0. Melee attacks upon the golem that miss by a roll of 2 while it is in its hardened state automatically rebound upon the attacker; the victim must roll to attack himself at -2 and miss in order to avoid taking damage from his own weapon. Failed missile attacks upon the golem while it is in this state rebound in a random direction. The hardened state of the golem lasts for 3 rounds.

Brass golems are usually assigned a particular territory to patrol. Any treasure found will be that of prior victims, and will be found scattered in that area.
Though rare, brass golems may be found in various dungeons built by mages. Unfortunately, the creation process has been lost to time. A functioning brass golem brought back to civilization may fetch a price as much as 30,000 gp; a disabled one is worth no less than 15,000 gp.

TREASURE: 25% - 1d4x1000 copper coins, 20% -
1d3x1000 silver coins, 90% - 10d8 gem stones, 80% -
5d6 jewelry items and 70 % - 1 magic weapon, 1 magic
armor and 1 miscellaneous magic item.