What are the advantages of upgrading weapons with Starstone?

Tianxingshi is used to evolve equipment. Every evolution requires the level of equipment to be upgraded by one level. At present, each piece of equipment is upgraded to 19 at most. Benefits: 1, you can get 100 basic natural damage with each evolution level upgrade. 2. When you evolve to a certain level, you can strengthen the damage to the next level. For example, a 10 all-day injury. Each piece of equipment can evolve to 19 at most.