Can only be destroyed by bombs, and it has an opportunity to fall souls hearts as opposed to coins/hearts/bombs. You will discover a few variations of keys, among which is not a pickup but alternatively an item that grants you 99 keys in whole. That is the silver Skeleton Essential. https://bindingofisaaclibertycap63483.blogzag.com/72939875/the-definitive-guide-to-liberty-cap-isaac