XP

XP is the main way to improve items. Items that you start with at the beginning of the game always have 0 XP, whilst items collected throughout the game (such as shop items) will have a random amount of XP when collected.

XP is collected via the forge, not by using the item in combat. By infusing or combining items in the forge, the items being infused will be destroyed, but the stats of the other item will be increased. Once the XP level crosses certain thresholds, it will rank up, improving its stats in the process. There are 5 ranks in the game, those being Bronze, Silver, Gold, Diamond, and Crystal.

The XP gained in the forge will vary, scaling positively with the rarity and XP of the items infused, and negatively with the rarity of the item being infused into.

Augmenters, a type a tech, will give much more XP than other items of its rarity. This is also the sole purpose of the Augmenter.