Dark Fissures are large portals to Coldharbour that summon Daedra to do the bidding of Molag Bal. As well as Molag Bal's massive Dark Anchors, he uses Dark Fissures to summon his warriors to further plunge the land into chaos.
Just like Dark Anchors, most, if not all Daedra types appear at Dark Fissures.
- Dark Fissures were originally not going to be included in The Elder Scrolls Online. With the February beta session, they were added to the game in a large update.