With Codex: World Eaters just around the corner, I thought it was time to bring up the topic of how to approach a new codex release with an existing Crusade.

The natural reaction to any new Codex might be to simply start again, but I find that solution extremely unsatisfying. Being a narrative format, it would be disappointing to simply throw out all the narrative development I've put into this force so far.

On the other hand, the Chaos Warband rules for CSM are pretty powerful, as far as benefits go. I have lost most of my battles, but all three Glory trackers are at Favoured status thanks to a judicious use of Agendas. And when a Chaos Warband is Favoured in a category, they get some significant discounts on important Requisitions - especially increasing supplies and adding WLTs and Relics. Importantly, there's no requirement to use those free Requisitions on CSM units, so you can add free WLTs and Relics to allied units as well...

There is one big disadvantage to this, however: if you have started a Chaos Warband, your trackers always go down in every battle, regardless of whether you even use CSM units or not. But to increase your Glory trackers, you must use your Warband Champion in battle. This means your Champion is always exposed to battle scars, and our campaign house rules state that scars can only be removed if a unit skips a battle. This is why Kratus, prior to his ascension, was being used in every battle (even when not the best choice) and had accumulated two very detrimental battle scars. For several battles, Kratus had been unable to perform Heroic Intervention, for example.

Ultimately, my concern is that I have benefited heavily from using the Chaos Warband rules, and those benefits might not be replicable with Codex: World Eaters, so they might feel undeserved. But then I did the Agendas and I suffered the battle scars on my Champion, to my detriment in many battles.

So, I have a solution:

1. All CSM-specific battle traits and Crusade relics will be exchanged for the nearest World Eater equivalents.
2. Arkrath benefits from keeping all his pre-ascension Chaos Boons. This is something currently unique to CSM, since both Death Guard and Thousand Sons Daemon Princes lose their boons upon ascension. I don't know which way World Eaters will go, but if WE Daemon Princes lose their boons on ascension, then I will need to drop those as well.
3. Similarly to (2), any benefits gained through the Chaos Warband that can't be done using the World Eaters' rules will be reversed. For example, Dreior's Berzerker squad gained a battle trait because I had a Favoured Warfleet - if World Eaters don't have some equivalent mechanic then I'll simply remove the trait.
4. If Berzerker PL changes to account for the new Berzerker Eviscerator, I may need to change unit sizes or I'll be at a significant disadvantage. The main reason they're at 8-man squads now (other than Khorne's number) is to match the 1:20 PL/points ratio.
5. Units that I've lost access to will need to be replaced with their nearest equivalents.

The last one will be easy enough for most things: Thrax the Exalted Champion will become a Master of Executions and the Cultists will become Jakhals. But the Dark Apostle, Baruda, will be a bit trickier. I may have to consider giving him a new weapon so he can conceivably use the rules for an MoE as well, but it feels boring to have two virtually identical characters. I'll have to think on that one.

Of course, all of this is assuming that World Eaters even get Crusade rules. There's no reason to believe we won't, but this Codex is looking like enough of a departure from existing 9th edition Codexes that there's a small part of me that wonders if maybe we won't. But hey, if that happens then I'll just continue using the CSM Crusade rules!