https://sentinelswiki.com/index.php?title=Bugbear#tab=Comic_Books:_Bugbear

Moris Dugal was working as hired muscle, protecting convoys of illicit substances as they made their way through Central America when his caravan was attached by a rival drug cartel. While fleeing, he sustained several gunshot wounds. He staggered into a huge, blocky pyramid deep in the jungle only to collapse in a pool of his own blood on an elaborately carved stone ledge. When he work, it was unclear how much time had passed. Hours? Days? The length of his hair indicated weeks, if not longer. He rolled over to find he had been laying on a glowing, blood red object. He pried the red gem out of the floor, then realized that there was no blood on the floor. There weren't even wounds in his body anymore. The gem radiated heat in his hand. He turned to toss it away, only to be stricken with incredible pain. Holding the bloodstone sight as his head swam, he understood on a primal level that this stone was his very life essence. And, much like himself, it HUNGERED. Now, Bugbear prowls the jungles. His insatiable hunger demands he find larger and larger prey. If he were to find a major population center, the toll would be horrendous.