It's difficult to see in the dark, with the chaos of other people waking up and throwing their own shadows about. But watching the dark figures casually rebuff attacks, he does notice they seem to be solidifying a bit. Is that a bad thing for them? Hard to say. In his world, the dead do not change or adapt. They're incapable of it.

"Alright. Keep an eye on them! I'll need a bit of time to recite the prayer."

With the sheer number of ghosts about, it would be more efficient to purge them with Gracefeel's holy flame. William strides forward until he's on the edge of the campfire's light before taking a knee, bowing his head, and clasping his hands before him. It won't take him more than a minute to finish - those watching may begin to notice a gentle light suffusing him - but such prayer will be worthless if it's interrupted.