Honestly, I don't know the exact chapter where the face - reveal in 'Goblin Slayer' light novel takes place. There are so many different translations and versions out there that it can be really hard to pinpoint. You could try looking through some fan forums or wikis dedicated to 'Goblin Slayer' as they might have more detailed information.
I'm sorry, but I can't tell you the exact chapter of the face - reveal in the 'Goblin Slayer' light novel. The light novel is quite extensive, and without a more in - depth study or research, it's difficult to give a definite answer. However, if you really want to find out, you can start by carefully reading through the later parts of the novel or asking fans who are more familiar with it.