Demilich (CR 29)

Diminutive Undead
Alignment: Neutral evil
Initiative: +7 (+3 Dex, +4 Improved Initiative); Senses: Darkvision 60 ft., Listen +27, and Spot +27
Languages: Any lnaguage known as a lich or when alive.

AC: 51 (+4 size, +3 Dex, +5 natural armor, +8 bracers of armor, +2 ring of protection, +21 insight), touch 14, flat-footed 48
Hit Dice: 21d12 (130 hp); DR: 15/Epic and bludgeoning
Fort +10, Ref +12, Will +17
Speed: Fly 180 ft. (perfect)
Space: 1 ft. by 1 ft./0 ft.
Base Attack +10; Grapple -2
Attack: Touch +35 melee
Full Attack: Touch +35 melee
Damage: Touch 10d6+20 plus paralyzing touch
Special Attacks/Actions: Trap the soul, fear aura, paralyzing touch, 21st-level wizard spellcaster, Perfect Automatic Still Spell, spell-like abilities
Abilities: Str 10, Dex 16(withgloves, Con -, Int 39(with headband, Wis 24, Cha 20
Special Qualities: Magic immunity, phylactery transference, turn resistance +20, undead traits, acid resistance 20, fire resistance 20, sonic resistance 20, immune to cold, electricity, polymorph, and mind-affecting attacks.
Feats: Brew Potion, Combat Casting, Craft Wondrous Item, Enlarge Spell, Heighten Spell, Improved Initiative, Lightning Reflexes, Maximize Spell, Quicken Spell, Scribe Scroll, Spell Penetration, Toughness; Automatic Quicken Spell, Epic Spellcasting, Improved Spell Capacity(10th), Tenacious Magic
Skills: Concentration +25, Craft (alchemy) +34, Hide +35, Knowledge (arcana, Knowledge (history) +26, Listen +27, Move Silently +23, Search +34, Sense Motive +27, Spellcraft +36, Spot +27, religion, and the planes) +34
Advancement: By character class
Climate/Terrain: Any
Organization: Solitary
Treasure: Standard

Source: Epic Level Handbook

Demiliches are wiser, older, and far deadlier than commmon liches.

A demilich often appears as a single skull whose and tooth sockets have been fitted with costly gems. Other demiliches might appear as gem-encrusted bones of another type, such as a skeletal hand or spine. The gems gleam wickedly with the light of stolen souls slowly devoured.

Particularly powerful liches sometimes learn the secret of fashioning soul gems, and so evolve to demilichdom. Demiliches are free to roam distant planes in astral form, leaving behind their physical remains to brood in dark tombs of horror. In their planar wanderings, which span centuries, demiliches seek to discover all the secrets of the multiverse, and beyond, applying themselves to the study of epic spells, the location unique artifacts, and the keys to release and control imprisoned abominations. Many pursue plans far deeper, which may eventually win them control of vast stretches of the multiverse, or even grant them the spark of godhood.

Demiliches speak the languages they knew as liches and as living creatures.