Lionel Hunter, Eva’s Knight in Heine, said that you must pass several tests to overcome your limit. First, you must reach Lv. 102. Second, you must defeat the monsters in the area he mentions and collect proof.

Monsters to Hunt - Monsters in Blazing Swamp, War-Torn Plains, Abandoned Coal Mines, Beleth's Magic Circle, Desert Quarry, Phantasmal Ridge, Enchanted Valley, Ivory Tower Crater, Silent Valley, Alligator Island, Tanor Canyon, Forest of Mirrors, Field of Silence, Isle of Prayer, Ketra Orc Outpost, Varka Silenos Barracks, Breka's Stronghold, Sel Mahum Training Grounds, Plains of the Lizardmen, Fields of Massacre, Wasteland, Fafurion Temple, Dragon Valley

You've passed all the tests that Lionel gave you. Go report to Lionel Hunter.