Amethyst theme is the GUI pack used for the mythcraft modpack, other than just retexturing minecraft GUI, Amethyst theme also retextures GUI from; irons spellbooks, Improvable skills, combat roll, boundless, codex and more.

Amethyst theme has 2 primary versions

A purple Amethyst theme for 1.20.1 used in mythcraft 4

A red Amethyst theme for 1.21.1 used in mythcraft 5

<-- LINKS -->