This being looks like a humanoid skull with several small gems inset in its eye sockets and mouth.
Skulleton CR 3
Speed fly 10 ft. (perfect)
Melee bite +5 (1d3-2 plus disease)
Space 2-1/2 ft.; Reach 0 ft.
Special Attacks dust
Str 6, Dex 10, Con –, Int 10, Wis 12, Cha 14
Base Atk +3; CMB +1; CMD 9 (can’t be tripped)
Feats Dazzling Display, Weapon FinesseB, Skill Focus (Intimidate)B, Weapon Focus (bite)
Skills Fly +19, Intimidate +12, Perception +11, Stealth +16
Languages Common (cannot speak)
The skulleton can use its crumbled remains to attack any creature that comes within 10 feet. Twice per day as a standard action, it can billow forth a cloud of dust that surrounds it in a 10-foot radius. Creatures caught within the area must succeed on a DC 14 Fortitude save or be nauseated for 6 rounds. The dust cloud remains for 2 rounds and can be affected by wind. The save DC is Charisma-based.
Skulletons are undead creatures believed to have been created by a lich or demilich, for the creature greatly resembles the latter in that it is nothing more than a pile of dust, a skull, and a collection of bones. The gemstones inset in its eye sockets and in place of its teeth are not gemstones at all, but painted glass (worthless). The skulleton is thought to have been created to frighten off would-be tomb plunderers, or convince them they have defeated the skulleton’s creator rather than a minor servitor and tomb guardian.
A skulleton lies in wait for its prey. When a living creature touches a skulleton, it uses its dust attack to incapacitate and confuse the intruders. Then it rises in the air, pivoting to face its prey and glowering in a display of fearsome presence, using its Dazzling Display feat as a full-round action to attempt to demoralize those near it. If the intruders have not fled, it moves in to bite with its gem-encrusted teeth.
Skulleton from the Tome of Horrors Complete, Copyright 2011, Necromancer Games, Inc., published and distributed by Frog God Games; Author Scott Greene.