Ice mephit
From Ardrana
Ice mephits are angular, with translucent, ice-blue skin. They live on the colder Lower Planes (especially the Paraelemental Plane of Ice) and thus never mix with mephits of planes closer to the Elemental Plane of Fire. Ice mephits act aloof and cruel, surpassing other mephits in torture and wanton destruction.
Note: Ice mephits originally appeared in this form in the Planescape Monstrous Compendium for the AD&D game from TSR. Their use here is for the purposes of providing context for the campaign only.