I've been having so much fun with this mod but im really struggling with the new items added. I really want to use them but it seems there's no way to know what are the items i need to look out for. Like right now im seeing i can create a sealed contract from the lich's drop but it requires this lunate charm that i can't find any information from. is this a boss drop? is this a craftable, and if so using what?

Really would appreciate if there's any info on the items instead of just being surprised that there's something new a boss drops.