This idea suggests a different update see the following photo.


the latter is common and Original.

this different update is good for that instead of creating new weapons would have an equal session of the craft and make equipment up each level paying the requested amount of money the prerequisite unico would be your their common previous - rare - epic - legendary - mythical


Example : You have Normal Fortress Floors , takes your money , puts his Fortress Walking in the same square that performs regular upgrare and pay required amount and managed his Fortress Floor rare repeat process becomes so epic lendary and finally Mythical.

Thats cool