How do you get the sword. I am very confused because I have unlocked everything in the game and even defeated that secret boss in the caves but I cant find the sword
I actually only found it after defeating the final boss. It's in the forest behind the larger spiky bush. It's easly missable since the grapling hook icon only shows up on the screen if you look up, something I imagine if you're using the auto aim (or have the FOV in close mode) you could easily not do since the tree tops are very low in this area.