Eris' Evil Thoughts:
Anybody who goes in the Casket Room is considered an intruder. Only three of her disciples, Eris, Kaerun, and Anais, the inventors of the seal devices, are permitted. I cannot directly help you because I can't leave here. Thus, there is no way in except to destroy the seals. Unfortunately, the seals are protected by the four Guardians of Relics...
"How can I defeat them?"