The party returned to the Emerald City to attend to their business affairs. Glasya, the daughter of Asmodeus approached them with a deal. She asked them to undermine Asmodeus’ allies in the Abyss by lying to Graz’zt about plans to restart the Blood War. She would use this distraction to start a coup against Asmodeus. In exchange, she promised the group a share of her power when she became the ruler of Baator.
When she left, they met an elf in the city named Sorenis. She told them that she was sent by Asmodeus to be their guide in the Abyss. She used a ritual to open a portal to Pazunia. They stepped through, finding themselves at the edge of the Blood Rift. A massive waterfall of blood spilled over the edge into the deep chasm. Sorenis told them that they would have to climb some distance to the city of Morglon-Daar. They began their perilous descent using climbing gear. It seemed like it took forever, but they finally got close to the city. A group of flying crystallised demons attacked them however, almost ending their journey.
They eventually overcame the demons, forcing them to assist in taking them down to the city. In the city of Morglon-Daar, the group was led to a building in the Riftwatch owned by people called “the Seekers of the Nadir.” They told them that their goal was to reach the bottom of the Abyss. To that end, they had been uncovering an ancient machine. This machine, a tower, was difficult to repair, but with the party’s help they were successful. They worked together, rolling the tower slowly over to the Rift.
They were intercepted by Bavamach, the archgeneral of the Morglon-Daar, who laid claim to the tower on the basis of it being a necessary siege weapon should the Blood War reignite. It took some effort, but eventually the party managed to convince Bavamach to let them leave. They pushed the tower over the Rift, everyone jumping aboard to begin their long descent. The party and the Seekers of the Nadir fell downward, the machine providing a barrier around the tower to protect it. As they travelled, they could see cracks along the Rift with light coming through from various layers of the Abyss. They fell for a day, then five days, then ten, then a hundred. Supplies began to run low, so they began to ration.