Troll Skeleton

Large (Undead) CR 3
HP 39, hd6d12 AC 14 (+3 Dex, ?1 size, +2 natural),, touch 12, flat-fooded 11 Fort +2, Ref +5, Will +5 Speed 30 ft. (6 squares) Initiative +7 Spot , Listen
Standard attacks BAB +3, Grapple +13
Attacks
Full attack: 2 claws +8 melee (1d6+6) and bite +3 melee (1d6+3)
Special Attacks/Qualities
?
Damage reduction 5/bludgeoning, darkvision 60 ft., immunity to cold, undead traits
Feats Improved Initiative
Str 23 Con Dex 16 Int Wis 10 Cha 1
Alignment Always neutral evil, Environment Cold mountains, Organisation Any

Skeletons are the animated bones of the dead, mindless automatons that obey the orders of their evil masters.
A skeleton is seldom garbed in anything more than the rotting remnants of any clothing or armor it was wearing when slain. A skeleton does only what it is ordered to do. It can draw no conclusions of its own and takes no initiative. Because of this limitation, its instructions must always be simple. A skeleton attacks until destroyed.

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System Reference Document -> List of Creatures (SRD)