Heh, a community webcomic? Cute.
Xorlak, ever heared of the dual-and-ex villain syndrome? It's where there are two main villains, except one gets somehow slightly insulted by the other ("DID YOU JUST CALL MY LEGENDARY SWORD 'RUSTY'!?!!") and the insulted villain joins forces with the heroes to get the runaway other villain...
Yeah, you could be like that. I think.