Board Thread:Shadow Fight 3 Discussion/@comment-129.45.89.164-20180804131627/@comment-25669516-20180804140355

It depends on luck and how much resources you're willing to spend. Some people use shadow energy to upgrade their gear, some get lucky and find the items they need in the daily store or through chests. And of course there are players who spend money to buy booster packs as well xD

Just be patient and keep playing. You'll get the upgrades you need eventually.