Make use of Hexerei TowerIt is a map you can enter by using the item "Hexerei Key".
You can receive large amount of Exp, Rugia, and Stat Ball by clearing.
-About Hexerei Tower Key
-How to obtain Hexerei Tower Key-Reward for clearing certain Quest.
-Reward for fulfilling certain Achievement.
-Reward for defeating Mission Boss.
*You may not receive it in certain occasion.
-Reward for clearing Phantasma World.
-From Dream Key Box you can produce from Seeker Judas.
-Purchase from Item Shop.
*There may be time it is not on sale.