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IF you want to become a supreme Summoner in Brave Frontier,you need to "Fuse" and "Evolve" your own heroes for them to gain the highest level and stars.

You need to fuse your heroes first before you able to Evolve it !!!You need to fuse it until it can reach the Max level.
You can find the fusion materials in "Vortex Dungeon" and "Quest".
But i suggest you to find it in Vortex,because the "EXP" are lot much better then in Quests.

The next one is Evolve

Just like Fusion,you can find Evolve materials both in Vortex Dungeon and Quests.
Evolution is one of the most important part in Brave Frontier if you want to be able to clearing any obstacles in front of you in Grand Gaia world.

This is the example of Evolution of Heroes in Brave Frontier:

FROM

BECOME

 Bonus Fanservices of Seria :