Destiny 2 Festival of the Lost in Season of Plunder is here. The guardian needs to get to Eva Levante to start the quest, and then progress the quest step to get loot in Destiny 2 Festival of the Lost.
After getting to Eva Levante, put on the Mask to progress the next quest step, and then get Spectral Page. Get to the Haunted sector and transform the Spectral Page to Manifest Page.
The hero get Spectral Page to progress the Gone But Not Forgotten quest step. Use the Spectral Page for Summoning Ritual in the Haunted Lost Sector.
Get loot on return to Eva Levante, or from event challenges completion or quest step completion.