Ghost of Wigoth:
You have gathered all 4 cups. Take them to the Nameless Soul at the Four Sepulchers. Should I send you to the entrance?
Before you go... Are you by any chance collecting Elmoreden relic fragments? Bring me 1000 fragments, and I will exchange them for an S-Grade Weapon Recipe. At my age, nostalgia for the old days is all I have left...
Ask him to send you to the entrance.