Welcome to TransmuteIt.
This plugin is inspired by ProjectE's transmutation tablet. I'm a big fan of the EMC system, and how you actually need to transmute the item to be able to transmute more of it. This is essentially just the tablet (as a command). No stone or anything. You can customize each EMC value and all that.
The design is to mimic it as much as possible, as a result:
You need to transmute an item to be able to transmute it.
Items have an "EMC" Value, in order to transmute one, you need enough EMC for it.
This plugin is compiled against and tested with Paper.
While it is compatible with Spigot, there may be some features that are missing.
You may run into NoSuchMethodErrors, or other issues.
While you can report these, and they will be fixed, it's recommended to just use Paper to avoid any errors altogether.
Current missing features:
getRarity() function on their Enchantment class, so enchantments are not calculated into the EMC value.I appreciate any and all feedback. Make sure to leave it on the Issues tab, I also welcome pull requests to help me out!
I'll occasionally post beta builds here (well, "stable"). There's more unstable builds are occasionally on my Jenkins server. The most stable builds are here on Modrinth, marked as a release/stable. If you do use the beta builds, make sure to stay as up to date as possible!

ProjectE's Transmutation system in a nice Spigot plugin!