The Bronze Citadel stands as one of the initial landmarks encountered within the harsh landscape of Avernus during the Chains of Asmodeus campaign, yet it remains largely undetailed. While Koh Tam advises the heroes to avoid lingering in this area, I propose an alternative suggestion: consider establishing the city as your initial base of operations.
Koh Tam's barge possesses the capability to plane shift upwards through the layers of Hell, but it lacks the capacity to do so in the opposite direction. With this in mind, it should be relatively simple for the heroes to retreat here, if needed.
In this book I've expanded the city by introducing various locations and NPCs. These additions will provide your heroes with a place of respite and adventure.
It's worth noting that the majority of the content described here can be adapted for use in various locations throughout the Nine Hells, allowing for flexibility in your campaign.
- from the publisher's blurb