During the three years Blackfur was active in the Ziggurat arena, more than one wife or girlfriend or lover mused "That beast is so unusual. He would make a good fur coat!" And more than one half-drunk lover would say "I'll go get it for you!" and volunteer to fight the beast in the arena.
Blackfur being Blackfur, someone would indeed end up wearing his fur coat, but not the person who asked for it. When he was given sapience and it became possible (with his permission) to look into his mouth without ending up in his stomach, it was found that the teeth at the back of his mouth were sharp and pointed back toward his throat - the beast was naturally adapted to swallowing prey whole. Later he would cough up any armor, fur, or bones he could not quickly digest, because why waste time when there was someone else to be eaten?
The combatants who have worn the Blackfur costumes over the years since his retirement often follow his example and eat living prey whole, but none of them are quite as good at it as the original.