Online:Infinite Archive/Boss List
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There are many bosses that can appear, from story quests bosses, dungeon bosses, trial bosses, and world bosses. You do not have to have previously encountered a boss in other areas of the game for it to appear in the Infinite Archive. Many of these bosses come from DLC content, but you do not need to have access to the relevant DLC to encounter them in the Archive.[verification needed — see talk page]
The Marauders do not appear in the boss Stages, but will appear randomly in any other Stage once per Arc, starting with Arc 2.