I've been wondering who will kill Xykon (or make him more deader), because he is gonna be killed by the end of the comic, I personally think it will be one of three people (though I imagine other people might have other theories).
- Roy: It makes sense, the protagonist, the blood oath, and all that (making him somewhat unlikely to actually strike the killing blow)
- Redcloak: He's almost certainly going to start helping the good guys at the end, and he has the phylactery making it easiest for him to kill him, especially after the body is destroyed.
- Belkar: I imagine this one is less obvious, but I feel like it would be appropriate for his final act to be unequivically Good, and he would likely die killing Xykon (maybe his final moments will involve the clasp no longer hurting him).