I haven't read any of the related subs, so I have no context. With that caveat in mind, I really like this. Especially the word play on sinister/left-handed (or left-socked, in this case :P ).
The idea of an evil god which sets up competing cults works well for me.
The only thing I was confused on was how could he survive what the other gods did not, yet be outdone by a group of mortal adventurers?