Item Evolution was released in an update on April 8th 2014, allowing certain Super Premium items to be evolved.Weapons are currently the only items that are evolvable. It is unknown whether or not this feature will expand to other items (i.e. armor, helms). Evolvable items have a golden Crescent badge in place of the golden star. Today there is currently 169 evolvable weapons in total.
Evolving an item will turn an existing evolvable item into a new one. It also increases weight, overall stats, and sometimes adds an extra buff slot, but it will revert the evolved item back by 9 levels. If you previously used statues to get your item to level 15 you do not have to repeat this process a second time once the weapon has been evolved. To evolve an item, it must be evolvable and at least level 10 or higher. After meeting the requirements, the player would be given the option to evolve the item in the Item Level-Up menu, the cost of evolving is 5000 Happy Stars or 13 Happy Tickets. This cannot be reverted.
Any white buffs that are on the item prior to evolving will remain on the item. In addition, certain orange buffs will be altered to a super variant of the buff (i.e. "Attack Up Lv3" will become "S. Attack Up Lv3").
List of Evolvable Items
There's currently a total of 169 evolvable weapons, spread across each class.