Talk:Dark Implosion/@comment-31990798-20170514194005/@comment-31479589-20170514225658

It's normal. Ranged Weapons and Magics can be upgraded to the next level with coins, as long as there is no new ranged weapon or magic available in the shop (with some exception). Once a new item is unlocked, they only can be level-upgraded with gems. In your case, 24 is the last level where you can use coins to upgrade its level. Once you reach level 25, you need gems.