So if I want it to be an enchantment I need a material that can hold, gather, and withstand enough magic to keep an illusion up for a long time, I don't have anything like that but I can find it, the problem is that the only thing that might work to hold the spell is a magical metal, magical metals are rare and expensive, they can have a very high magical capacity, even higher then a lot of gems, but even with a decent magical metal the illusion spell would take too much magic, so I need to get creative.