The Hound and the Hand
The lawful God Tyr lost his right hand to Kezef the Chaos Hound, a devourer of souls and one of the primordial evils. A coalition of Gods hell-bent on taking down Kezef chased the hound to the Barrens of Doom and Despair, and offered him a compact. If the hound could break chains made by the smith God, Gond, the Gods would dissolve their union and leave Kezef be. Kezef was skeptical, but he agreed... so long as Tyr put his hand in the hound's mouth. Tyr looked upon the slavering jaws, each tooth as long as a spear, and he agreed at once. Of course Kezef had not accounted for the strength of the chain, which was rooted in hellish Cocytus and blessed by the Goddess of magic, Mystra. Unable to break free, he bit Tyr's hand clean off, and Tyr sealed the bleeding stump, and walked one-handed forevermore, as if it were a badge of honour, which indeed it was, and boldness and courage besides.