n small earth elemental 

Perception +3; darkvision, tremorsense (imprecise) 30 feet

Languages Terran

Skills Athletics +6, Stealth +2

Str +3 Dex -1 Con +2 Int -2 Wis +0 Cha -1

AC  15; Fort +8, Ref +4, Will +3

HP 20, fast healing 2 (while underground)

Speed 20 feet, burrow 20 feet, fly 15 feet

Melee [>] fist +8, Damage 1d6+3 bludgeoning

Arcane Innate Spells DC 17; 3rd meld into stone; 2nd enlarge (self only)

Breath Weapon [>>] (arcane, earth) The earth mephit breathes rocks in a 15-foot cone that deals 2d6 bludgeoning damage to each creature within the area (DC 17 basic Reflex save). The earth mephit can't use Breath Weapon again for 1d4 rounds.

Bestiary, page 150. Expanded in LOIL.