Enter a Haunted Sector via the node in your Director. Once there, complete a Summoning Ritual.
Don your Festival mask and join Glint in exploring the Haunted Sectors of the system. Help him complete the Book of the Forgotten by earning Spectral Pages and manifesting them in battles against long-lost monsters filled with hair-raising loot!
"All of our research points to a few terrifying, haunted, dangerous locations. Are you sure you still want to do this? I'm starting to have second thoughts…" —Glint