Sound> Just reach level50 with a personnal earring and try to level up it again. Now, there is the equipement evolution screen insead of the level up screen. You need 8 stones to evolve the equipement (at least for 5*'s equipements) and maybe coins but I'm not sure.
And yep, it cost a lot of coins. More than a gold evolution. It's 187500 for 5*'s equipement.
Nutaku: July 2016 | Flower Knight Girl: 835228859 | DMM: 646263953 飢えたハンター
Plays Flower Knight Girl, Aigis, Kamihime
Dropped Harem Heroes. Staff deleted my nice reason for not spending $.
Signature made by Myrdin
Oh you Hunter. You progress on doing personnel weapon. You oil-rich milloinaire hahahaha.
Finally my Money Tree got her personnal weapon. Now, I need 24 more gold stones to make Christmas Chainsaw, Poppy and Camelia weapons... Espacially Camelia's and Poppy's for better counter.