well i just watch a theory about how crystal and gems in MLP already carry some special magic on their own, it just each have different level so some almost harmless and some as we can see like the Crystal Heart or The Alicorn amulet. So see this and I goes like PERFECT now this is good idea for a replacement horn for my sweet girl ~if u want to hear www.youtube.com/watch?v=kOjBmu… i like the idea they have their own magic than you know, some point in the video said powerful unicorn store their magic in there and stuff