He's talking about he plot.
If one of those guys survives, they would report what happened back to the kingdom, specially with he death of a holy Knight.
However if no one survives, no reports!
So grey just needs to kill everyone
Well, technically surviving and returning aren't tied together.
The hero for example will probably get adopted since he'd got knocked out before doing anything.
He use to be a holy knight then he took an arrow to the dick (& get decapitated). My only complaint is that I wished Grey didn’t kill him because I preferred if he suffered from making those threats about raping Ariamel. Regardless, the priest better get his & not escape. Thanks for the translation.
Edit: initially I had a different joke but didn’t feel like it had enough oomph to it. Don’t you guys hate it that you’re about to use a special move only to be rudely interrupted & get an arrow to the dick.
Grey already tried to kill the priest when he implied Ariamel might no longer be a virgin, so yeah he's definitely dead.
And it's in his character to just kill them off asap, to him ensure security by killing them off is more practical than making them suffer.
After all any time he spent torturing them is time he could be spending with his family.