Source: Final Fantasy II for Super Nintendo
Climate/Terrain: Underground, ruins
Activitiy Cycle: Any
Intelligence: Average (8-10)
Alignment: Neutral Evil
No. Appearing: 1
Armor Class: -3 
Hit Dice: 10
Thac0 [To hit Bonus]: 11 [+9]
No. of Attacks: 1
Damage/Attack: See below
Special Attacks: See below
Special Defenses: See below
Magic Resistance: See below
Morale: Steady (11-12)
XP Value: 12,000
An evil mask is a vicious cybernetic sentry found deep within alien and eldritch ruins, beneath the surface of the moon, guarding secrets too terrible for mankind to know.
When intruders come within 100ft, it activates, rising out of the floor or coming out of secret door in the wall.
Reflect Barrier: In combat, an evil mask will first invoke its Reflect Barrier ability, granting itself 95% magic resistance. Any spells cast against the evil mask will reflect back against the caster. Physical attacks will still harm the evil mask. On following round, the evil mask will raise a Reflect Barrier around an enemy spellcaster. Any spells cast on said caster will reflect back to the evil mask—including healing spells. This ability functions as a 15th level spellcaster and can be dispelled.
Laser Barrage: Every 1d4+1 rounds, an evil mask will unleash a barrage of laser fire in a 100 foot cone in front of it. It gets 8 attacks, each laser doing 2d8 damage, though it may allocate its fire as it chooses.
Spell-like abilities (all once per day as a 10th level spellcaster): cone of cold, cloudkill, fireball, cure serious wounds.
It is immune to mind-effects such as sleep and charm, as well as cold effects. It requires a +2 or better magic weapon to hit.