Board Thread:Shadow Fight 2 Discussion/@comment-1.32.72.206-20150918010009/@comment-25669516-20170916053612

Well, you can't get it again so if you want to use it at later levels you'll have to upgrade using gems :(

If you have the full set it will have unlocked the mythical recipe though, so it will be better to just grind Ascension a bit for orbs and enchant a new set with Tempest Rage.