<Snipped quote by Nytem4re>
True, should have given that more thought. Because almost everything is considered a sin according to the bible, (if I understand it correctly, I'm not too versed in fantasy literature), there would have to be a limit. Maybe a "sin" would be killing/causing serious injury on purpose.
<Snipped quote by Nytem4re>
I was operating on the premise that only humans have souls. Besides, if he did that, I imagine the team's "masters" wouldn't take kindly to that. It wouldn't make much sense to do something knowing you'll end up crippled.
It just is too OP in my eyes. Anyone unaware of his power would just not be an obstacle at all, as he can just quickly grab them, they'd look at him wondering why, and promptly be sent to hell once he says whatever. It also brings up to many other theological questions I'd rather not get into. You must either make it harder from him to just send people to hell or not have it so he banishes them to eternal damnation with a simple parlor trick.
Also what constitutes as a sin is really up to interpretation, and I'd rather not try and decide whether the person you are banishing has actually sinned or not. There's also the concept of original sin in Christianity, the idea everyone is born a sinner, whether confession would prevent someone from being banished to hell. Though I assume you mean more of mortal sins than petty ones.
That being said, I'd be fine with it if he had to go through some ritual or something of the like. As it stands, way too easy.