Zarbor, Let me see where to start with this one. I know how about the begining.
He came to the city of Apuch and the knights of Dragon Fire by way of birth-rite. His father was a lord so it gave him the rite for knight hood. Things were going well for Zarbor. After his training he moved up through the ranks and became the second in command with them. They have said that he fights like Talon, he thrives off of it.
When Zarbor came into contact with Dragon's Inc. He became jealous of them in particular with thier leader Ryloth. He longed for the adventure. Talon seeing this and fearing the worse let him go with them. He was doing his job well but always butted heads with Ryloth. He thought that some of Ryloth's tatics were crude and that he was unskilled in the matter of warfare and battle.
Zarbor longed to become the leader of Dragon's Inc. During a fight with some drow it came to a head with the two of them. Zarbor would never be the same again. His heart grew cold and he forgot the ways of knighthood. While traveling one day with the group Zarbor plotted to have Ryloth killed.
Zarbor's god, knowing this, took steps to stop him. He took steps to bring him back from the side of darkness, but he was too late and Zarbor denouced his god. The one thing that Zarbor forgot was not to make a god mad. His god took his life and turned him into what he was becoming. Now Zarbor walks with the damned. Zarbor blames Dragon's Inc for what happened to him and he will use who or what ever it takes to kill the one group that took everthing he knew from him. Dragon's Inc and their leader Ryloth D'Are.