The Archenemy/Notes

Enter the portal and prevent from breaking the seal.
Once inside, attack the . This will cause many more to appear. They have 4.7 million HP so you will need a party at least. This place deals a lot of area damage so you will also need good heals. You must smack and destroy them as fast as you can to keep energy levels down. Miss one and be prepared to be smote mightily.
Fail and you will revive just outside but your tombstone will be just inside .
It seems that it is not possible to solo this, as you really need to smack more than one at a time, but Ancientgear (Erebos server) assures me that it can be done.
Once you have defeated , you may loot the for your rewards.