Evan Graham:
Simple. You have to kill monsters on the War-Torn Plains. They drop Hot Energy, so bring me 1000 of them as proof of your victory. You can also get the items from monsters of the Blasing Swamp.
During this quest you have to reach Lv. 100.
When you're done, go to Dual Class Master Joachim.
Use the Teleportation cubic to return to him.