The Horsemen learn that Dagon, the Drowned King is also helping Lucifer as Lucifer has offered Eden to him. But after the Horsemen leave, Lucifer arrives and punishes him. After stopping the operation, they confront and defeat Belial but spare him. The demon Belial is in charge of this operation. After killing him, the Horsemen return to Vulgrim and Samael where they learn that Lucifer has opened a path to Eden, bringing its sacred water and turning it into poison. They find Mammon with several relics and weapons from Eden. Samael arrives at this point and suggests that the Horsemen find Mammon and make him talk about Lucifer. After collecting the required artifacts Vulgrim informs them that Lucifer has paid a visit to Mammon, another Master of Hell. Vulgrim informs them he can help track down Lucifer but he needs several artifacts.

The Horsemen travel through the Void and find Vulgrim to be the associate Samael spoke of. Before he can say anything else, Moloch attacks and Samael teleports the Horsemen to the Void to find and talk to his associate. Samael informs them that he is not in league with Lucifer and the current attack on him is the result of that. After invading Samael's keep, they find it under attack from another Master of Hell, albeit a lesser one: Moloch. The Council suspects that the demon king Lucifer is planning something with Samael to upset the Balance and orders War and Strife to investigate. After the Four Horsemen have attacked and decimated the Nephilim in Eden, they are summoned by the Charred Council.

Darksiders story