In this 88-page hardback book, you'll find:

- The story of Haarken Worldclaimer's conquest of the Nachmund Gauntlet, including the siege of the Chaos Knight world Dharrovar, and the Imperium's attempts to resist them at all costs
- An in-depth War of Desperation campaign system for all modes of play – fight for control of three brutal War Zones, each with its own special rules and Legendary Mission
- Crusade rules to represent mobile Space Marine raiding forces and devoted hordes of Chaos Undivided, plus new arcane rituals for the Thousand Sons
- Additional rules content, including a Codex Supplement for the Castellans of the Rift Chapter of Space Marines, and Armies of Renown for Tzaangor-themed Thousand Sons and the Drukhari's Haemonculus Covens

You will need a copy of the Warhammer 40,000 Core Book to use the contents of this book.