Radiant Mephit

(from Planescape: Monstrous Compendium Appendix I - 1994):

Prone to non sequiturs and glazed looks, radiant mephits appear permanently, blissfully dazed by the glories of the quasi-plane of Radiance. They peer fixedly at people and say things like, “Have you too seen the majesty of the Ultimate Light? Oh, look at that amazing reflection on your armor there! Nice . . . Sorry, was I talking?” They take overblown names as do other mephits, hut never remember them. 

Radiant mephits have silvery bodies that perfectly reflect their surroundings like a mirror, large black eyes, and thin prismatic wings. They have wide mouths, but their faces are usually expressionless, except during their sudden fits of crazed giggling. 

Combat: Radiant mephits can attack with two claws (Id3 damage each). They can cast color spray once per turn at 6th level of magic use. However, unless directly attacked, they usually become distracted and forget their opponents. 

Once per hour a radiant mephit can attempt to gate in another radiant mephit. 

Radiant mephits are immune to all spells that affect or work through vision, including color spray and visual illusions, but they receive no saving throws against mind-affecting magic. They have infravision to 120’. In strong light they regenerate 1 hp per turn. 

Ecology: Radiant mephits lack the attention span to carry out missions. They are created primarily because some powerful beings of lawful alignment find their color sprays (dim recreations of the plane of Radiance) soothing or mesmerizing.