ne gargantuan mindless skeleton undead 

Perception +17; darkvision

Skills Athletics +22

Str +7 Dex +0 Con +5 Int -5 Wis +2 Cha +0

AC  27; Fort +20, Ref +13, Will +17

HP 140, negative healing; Immunities mental, poison, death effects, disease, paralyzed, unconscious; Resistances cold 10, electricity 10, fire 10, piercing 10, slashing 10

Speed 40 feet

Melee [>] jaws +20 (deadly d12, reach 20 feet), Damage 2d12+9 piercing plus Grab

Melee [>] foot +20 (reach 15 feet), Damage 2d10+9 bludgeoning

Rib Skewer [>] The tyrannosaurus skeleton bends down, attempting to skewer one adjacent creature on one of its massive ribs. The creature takes 2d10+9 piercing damage (DC 28 basic Reflex save). If the creature fails its save and is Medium or smaller, it's also impaled and stuck to the rib. It moves with the skeleton and takes 2d6 persistent bleed damage until it either Escapes or someone uses Force Open to break the rib (either is DC 28).

Trample [>>>] Huge or smaller, foot, DC 28

Bestiary 3, page 236. Expanded in LOIL.