Slaski:
We know he is a traitor who tried to incite a rebellion against the gods, but it's been so long that the details are vague.
Still, the outcome is obvious, no? The rebels were wiped out, and the gods locked up Spezion as a warning to anyone who would challenge them.
I worry that he may be coming back, and I need a brave adventurer like you to help.
"How would I do that?"