A machine’s UI contains 5 modification slots to the right. These can contain any combination of Amethyst, Vulcaanium, or Mysterious Crystals in order to modify how the machine works.
Machines can be ascended by placing Vulcaanium Crystals in any modification slot. Ascending a machine enhances its abilities, such as making a Breaker break more blocks, or an Acronite Cage throw further.
Machines can be reduced by placing Amethyst Crystals in any modification slot. Reducing a machine reduces its Tempite cost by a certain amount.