Season of the Witch

Savathûn's Ghost Immaru has approached the Vanguard with a dire bargain: the Witch Queen holds the information we need to pursue the Witness and will share it with us if we first contend with her sister, Xivu Arath. Through the power of arcane rituals, the Guardians must gather tithes for Eris Morn so she can fulfill this dangerous pact with the Hive god of lies.

Books from this season

Rites of Passage8 chapters
Tales of the Forgotten – Vol. 333 chapters
Sororicide12 chapters

Season inferred from the order in which Bungie added the lore.