*Allows you to level one piece of equip at a time, if you do, your exp will be split 90-10 to the equip.
*To stop giving experience to equips, remove it or disable leveling.
*You can level up to two stats (out of five kinds) per piece.
*Level cap of the equipment is your level.
*When you gain enough experience, you will level one stat on the equipment randomly.
*This is just like mastery exp, quest exp will not be used.
*Costumes, Arrows and Bullets can't be leveled.
Basically, more of a time waster, except this further ties you to equipment, meaning that you now have one more reason to buy hammers.
Kinda genius really.