Piecing together the catastrophe from item descriptions, Verakoth's boss dialogue, and the murals in the Vault of Echoes.

Six major questlines, three of which are missable. Chronological ordering, lore implications, and which choices affect endings.

Extinguish / Reignite / Covenant / Secret ending. What you need to do, what the cutscenes imply, and which is considered canon by the developers.

Who was the Ashen King before the First Burning? Every fragment of his history assembled in order, including the two items that contradict each other.