n medium earth elemental 

Perception +15; darkvision, tremorsense (imprecise) 60 feet

Languages Common, Terran

Skills Athletics +17, Geology Lore +15, Stealth +11, Survival +15

Str +6 Dex +0 Con +5 Int +0 Wis +2 Cha +0

AC  25; all-around vision; Fort +18, Ref +11, Will +13

HP 115; Immunities bleed, poison, paralyzed, sleep; Resistances cold 5, electricity 5, fire 5

Speed 20 feet, burrow 20 feet; earth glide

Melee [>] jaw +18 (deadly 1d10), Damage 2d10+8 piercing

Melee [>] claw +18 (agile), Damage 2d6+8 slashing

Claw Frenzy [>>] The xorn makes three claw Strikes; no more than two can be against the same target. These attacks count toward the xorn's multiple attack penalty, but the penalty doesn't increase until after all the attacks have been made.

Earth Glide The xorn can Burrow through any earthen matter, including rock. When it does so, the xorn moves at its full burrow Speed, leaving no tunnels or signs of its passing.

Bestiary, page 146. Expanded in LOIL.