We can use this mechanic in the next part, I won't say what it does but it definitely is a big game changer. If we can use this in the 2nd part we should be able to use this in the main map as well, it would definitely add more horror to not only the 2nd part but also the main map as well.
#(Spoilers?) Make the Plank Hammer Mechanic Usable for Main Map
bleak grove