Minecraft Dungeons:Mason

"There's also a Mason who will give you Diamond Dust in exchange for Emeralds. Diamond Dust can be used to increase the Power Level of a piece of gear."

- Minecraft Dungeons Guide Book

A mason is an unimplemented NPC in the camp who would increase the power level of the player's current gear using diamond dust. It is unknown where the Mason would have been found. On September 8th of 2020, the mason’s item upgrading functionality was taken over by the blacksmith, and the stall area the mason would have used was taken over by the.