The Erebus Dungeon
The Erebus is a dungeon located in the Enchanted Forest map. You can teleport to the dungeon through dungeon info, check the green icon next to the mini map. Level requirement is 95 and you need stone of the dryads for entrance (you can buy from item mall for 1k tec points, the item is also not trade-able). For this dungeon you need strong against devil. Goodluck!