Brenda can't do that either, but she can go investigate some corpses. Who, how many, dead of what?

Dead of what is easy to figure out - it's ghoul fever, judging by the fact that the smell is coming from ghouls. Who and how many is much harder to figure out, but if she heads out of the chapel itself looking for ghouls she can spot five of them pretty quickly - at, admittedly, about the same time they spot her.

Brenda applies the standard first-line treatment for end-stage ghoul fever (slicing them in half).

Likewise. 

The ghouls object to this, and the arrows that start sprouting from their flesh get a similarly poor reception. In the case of the ones closest to Brenda and Seelah, this doesn't much matter, but one of them manages to get to cover and another lunges for Ember as the presumptive weakest of the group.

Seelah goes after the one going for Ember. The girl is a lot more dangerous than she looks, but you still gotta keep the casters out of melee.

Brenda chases after the other one in case it means to come back with friends.

Ember ducks around the blow, but it's not alive enough to go to sleep and there's nothing else she can do to a ghoul without killing it. She's considering whether killing a ghoul is enough more like saving someone from being hurt than it is like killing someone that she should be healing it, but Seelah cuts it down with a sword before she finishes.

It mostly just meant to get a stone wall between it and the sudden adventurer party to try safely shooting arrows but if she's just going to vault over the wall like that it's going to try legging it instead.

Brenda is aware that ghouls have to eat people to live and also that being a ghoul is worse than the majority of afterlives, so when she catches up to this one it gets skewered without much in the way of emotions.

Personally he rather preferred staying alive, but apparently nobody was asking for his opinion here!

...Apparently that was only the last of the ghouls in this group, because from the sound of things there are a whole bunch more of them on this mountaintop. Some of them heard the commotion and are headed over to investigates.

The actual goal here is to find any further prisoners and any important intel and then get out, but if they need to kill another wave of ghouls first then okay.