Talk:Sahar/@comment-184.98.79.74-20150923222458/@comment-4010041-20150923231840

http://castleage.wikia.com/wiki/Hero_Crystal#General_Leveling

Please check the table above.

To get to an Agressive Hero to level 35 you will need 10 Red Evolution Crystals, 4 Green Evolution Crystals, 2 BLue Evolution Crystals, and 2 Hero Crystals.

It should tell show you in-game what you need when you try to upgrade as well.