Daevanion items can be obtained by completing some missions, and like the Abyss and Draconic items, Daevanion items are a new category of items. Daevanion missions are received by all classes from both factions at the same levels.
These are the lvl 30 Quests:
Those quests starts with Leah, the litle girl in midle of "Exalted Path" (screenshoot)
1st Quest
2'nd Quest
3'rd Quest
At level 30 and at 50, you will receive the Daevanion missions. The first mission will automatically be activate upon hitting level 30.
