Game Rules Guide

Merging turns 2 copies of the same item at the same level into 1 copy of that item at the next level. The highest gear level is 10, and items at level 10 cannot be merged further. You need 2 copies in your bag: a copy you have equipped does not count, so unequip it first if you want to use it. Higher levels give more Journey power once the item is equipped. The Equipment screen disables the merge button while a Journey run is open.