Oathbound: Wrack & Ruin further details the city of Penance, first covered in chapters 6 and 7 of Oathbound: Domains of the Forge, providing extensive coverage of the lost city or "wrack" (abandoned areas), and the undercity or "maze" (the layers and layers of sunken city beneath the surface). Chapters cover the power structures, the people and powers, the lost city, the undercity, a quest involving 5 to 8 characters of 8th to 12th level in the city's power struggles, and appendixes on spells, items, monsters, and rules and advice on designing the maze.

From the back cover:

The bulk of the City of Penance is a madly stacked and sprawling ruin, only superficially explored by the relentless rafters and treasure-seekers of the surface world. Every home in the city has a hundred others lost beneath it, and every city street stands atop an incredible three-dimensional maze of corridors, alleyways, and crawlspaces — a maze where time has left nothing unchanged, eroding and distorting the framework of magic and even the laws of physics themselves.

Within Wrack & Ruin you'll find:

• 3 new player-character races
• 5 new prestige races
• 2 new prestige classes
• New magic items, monsters, and spells

Wrack & Ruin requires the use of the Dungeons & Dragons Player's Handbook, Third Edition, published by Wizards of the Coast. The core campaign book, Oathbound: Domains of the Forge, is also highly recommended.

This product is an adventure for use with the Dungeons & Dragons core rulebooks. It is published under the Open Gaming License (OGL) and is compatible with the D&D 3.0/3.5 edition rules and the D20 System.