I would also keep in mind the fact that other followers of the old god - Bane, I guess - probably won't be happy about the player defecting. Most priests are commoners who can't cast spells, so those who can would be seen as especially favored by the god. For a "chosen one" to turn their back on the religion could be theologically huge - even moreso if the character is level 6 or higher. Think of a Pope or a Sephardi Chief Rabbi or a Dalai Lama suddenly abandoning their old ways. You'd have shock and disbelief, and not a few parties interested in keeping the event a secret - by any means necessary.
I allow anyone to change their character when they aren't having fun. Keeping their level and replacing their magic items and wealth with similar ones.Ok, but if he want to change a class what happens to his levels?
As noted, no rules for this; you'll have to talk to the player and make up something on the fly.Hello,
recently the Cleric in the party has left his Deity (Bane) i was looking in the rule books on info but could not find anything, are there any rules like to what happen to the cleric level and so on?
Thanks

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.