Chalk apparently brought the corpse of the dark creeper with him out of the nexus. The party took it to the creepy man in the tower who offered to stuff it for a fee. Chalk crammed it in a mail slot, and all was good-ish.
They asked around about the creepers, got into a fight with some goons in an alley, and eventually ended up in an establishment run by paladins. In the basement, there was a portal to the Shadowfell. Hijinx ensued, and they went through it.
During most of this, WRATHGAR was impressing the crowd by bench-pressing boulders. With his dick.