http://www.native-languages.org/stifflegged.htm
Naked Bear
Huge Magical Beast
Hit Dice: 15d10+90 (172 hp)
Initiative: +4
Speed: 4 ft. (8 squares)
Armor Class: 20 (-2 Size, +12 Natural), touch 8, flat-footed 20
Base Attack/Grapple: +15/+34
Attack: Claw +24 melee (2d6+11)
Full Attack: 2 Claws +24 melee (2d6+11) and 1 Bite +19 melee (3d8+5/19-20)
Space/Reach: 15 ft./10 ft.
Special Attacks: Improved Grab
Special Qualities: Darkvision 60 ft., Trackless Step, DR 15/Weak Spot
Saves: Fort +15, Ref +9, Will +6
Abilities: Str 32, Dex 11, Con 23, Int 8, Wis 12, Cha 16
Skills: Listen +7, Spot +7, Survival +7, Swim +15
Feats: Endurance, Improved Critical (Bite), Improved Initiative, Improved Natural Attack (Bite), Run, Track
Environment: Temperate Forest
Organization: Solitary
Challenge Rating: 8
Treasure: None
Alignment: Neutral (possibly Neutral Evil)
Advancement: 16-30 HD (Huge), 31-45 HD (Gargantuan)
Level Adjustment: ---
This horrifying monster is known by many names, The Penobscot call him Gici Awas (Hairless Bear), and claim his fur fell out a a result of eating human flesh. The Cree call him Kat****uashku, or Stiff-Legged Bear. The Creek call him Atipa-tcopa (Big Man-Eater). The Iroquois know him as Nyah-gwaheh (Great Bear), while the Lenape know him as Yakwawi'ak. In some cases the Naked Bear is unique, in others it is a group of man-eating monsters. In most cases they are enormous, hairless bears, with oversized heads and stiff legs. They are tireless man-eaters who will consume entire tribes if not caught, and in most stories are invulnerable to human weapons, other than the soles of their feet.
Improved Grab (Ex): To use this ability, a Naked Bear must hit an opponent of up to one size smaller with its bite attack. It can then attempt to start a Grapple as a Free Action without provoking an Attack of Opportunity. If it wins the Grapple Check, it establishes a hold and does it's bite damage each round.
Trackless Step (Ex): If it chooses to the Naked Bear leaves no trail in natural surroundings and cannot be tracked by non-magical means.
Damage Reduction (Ex): In many of the myths the Naked or Stiff-Legged Bear is immune to human weaponry, except for arrows shot into the soles of it's feet. To simulate this, it has DR 15/- that does not work against confirmed Critical hits or attacks that purposefully target this weak spot. Opponents can make a DC 25 Knowledge (Arcana) check to know what the Naked Bear's Weak Spot is. They may then take a -x Penalty on their attack roll to target the Weak Spot.
Skills: Naked Bears have a +4 Racial Bonus Survival Checks made for tracking, and Swim Checks.
Combat: Naked Bears are not subtle beings by nature. They head directly into the fray and begin lashing out for all they're worth.