This was a contest of pride. It will never end unless one concedes one way or another. Or just consider him a persona non grata. When you play, pretend he didn't post at all. Do not validate his existence by responding. He just feeds off people's reactions just like any troll. Even gods die when they are not worshipped.
God-modding is a serious annoying problem on gaia, in my opinion. I have gone into threads that post "No God-Modding" and what do I find, god-modding. One problem is that some people don't know the full extant of the definition. Some think it just means controlling other peoples characters. Its been a while since I have been in a thread without god-modding, not counting my current long term rp.