Warhammer 40K Tabletop Thread XXXIII: Only in Nerf Does Duty End

[Cheesegear]

I do so dearly hope my Tau get their codex after TSons and Custodes.

...I think Custodes come first, then Thousand Sons. Unlike a lot of Factions in the game, Magnus actually did make it to Terra and did make an assault on it (take that, Abaddon).
After Thousand Sons, Space Wolves would be the logical choice.