Board Thread:Questions and Answers/@comment-71.230.84.59-20140330015509/@comment-3241231-20140330034205

Do you have all the requirements to increase his level? As a balanced general, he needs: 1 Hero Crystal, 3 Blue Evolution Crystals, 1 each Green/Red Evolution Crystals, 200 Attack/Damage essence and 100 Defense/Health essence. If you are missing any of those materials, you won't be able to increase his level any further.