Belt of Constitution

Description:

A thick and warm belt made from the pelt of a bearhound said to be native to the Sunny Isles. This belt, though at first simple in appearance, shows a few bits of colorium within its crafting to act as a magical focus of the item. A belt buckle of bronze with the Aiter "The Spell Forge" of Galdrabok master smiths mark upon it as an insignia.
With a secondary layer of scales wrapped around the warm pelt, the belt now glimmers in the light. Frost white and a pale blue scale cover the entire length front to back, insulating the belt further from the cold. Though each scale seems large enough to hold a rune itself, most are left blank currently.
 

Item Effect:

This item grants a +4 to constitution to its wearer as a temporary buff that continues until removed. In exchange for the demonic bloodline effect of the crafter, this item cannot be disabled unless by another of the ancient bloodlines.
  This item also automatically changes it shape and size per its user.
 

Additions

Frosty Willy's Scales

A lesser apex frost worm scales have been added to the belt to give it seemingly more power. As the material was added, the wielder now seems to have a natural affinity for cold. Granting the user a DR 20 against all cold attacks. This material seems strong enough to enchant further, with each of its scales as large as dinner plates.  

Curse:

Bears Wintery Hunger

This item was crafted by one with demonic blood, allowing for its user to gain far more magic out of it then normal. In exchange the item accepts a "power source" for the immense power. This item seems to be made from bearhound leather in which the wielder cannot remove the item once put on unless they lose over a quarter of there body weight. At which point the item falls off as if waiting for a new host. This item cannot be worn by the same user twice in there natural lifetime.
  Lastly, when winter is upon the world, the wielder begins to feel an ferocious hunger. The wielder must by the beginning of winter, gain over 1/8th there body weight or the item will forcibly begin devouring the users constitution each day that the weight has not been put on. Eventually starving its host to death.
 

Ego

This belt seems to be on the brink of awakening its full understanding. With a currently neutral alignment, the belt is believed to have the ego of a great grizzly bear. Or so would be what the wielder describes the loud snoring they hear on a constant.
  Aura: Overwhelming Transmutation
Caster Level: 6th
Requirements: Craft Wonderous Item, Bearhound Leather, Demonic Bloodline (Dormant)
Market Value: 10,000,000gp
Cost (if applicable): 125,000gp (based on average quest for creature)