Folugub (CR 3)

Medium Aberration
Alignment: Always neutral
Initiative: +3 (Dex); Senses: scent, Listen +8, and Spot +8

AC: 18 (+3 Dex, +5 natural), touch 13, flat-footed 15
Hit Dice: 4d8+12 (30 hp)
Fort +4, Ref +4, Will +5
Speed: 40 ft.
Space: 5 ft./5 ft.
Base Attack +3; Grapple -2
Attack: Tongue touch +3 melee, bite -2 melee
Full Attack: Tongue touch +3 melee, bite -2 melee
Damage: Tongue touch liquefy, bite 2d4
Special Attacks/Actions: Liquefy
Abilities: Str 10, Dex 17, Con 17, Int 2, Wis 13, Cha 8
Special Qualities: -
Feats: Alertness
Skills: Listen +8 and Spot +8
Advancement: 5-6 HD (Medium-size); 7-14 HD (Large)
Climate/Terrain: Any underground
Organization: Solitary or pair
Treasure/Possessions: None

Source: Psionics Handbook

Liquefy (Ex): A folugub that makes a successful touch attack with its tongue causes the target crystal to change phase, turning from solid to liquid and becoming immediately worthless. The size of the object is immaterial -- a crystal statue liquefies as quickly as a diamond in a ring. Crystalline psionic armor and weapons, and other psionic items composed of crystal, must succeed at a Reflex save (DC 20) or be liquefied. Attacks against objects in the possession of others draw attacks of opportunity. A crystalline weapon that deals damage to a folugub also liquefies immediately.

Feats: Fologubs gain Alertness as a bonus feat.

A folugub can scent a crystal object up to 90 feet away, and once it has the scent, little deters it from its goal. It usually ceases attacking to devour a freshly liquefied crystal. The creature targets the largest crystal object available.