Background.  Swarms have been a feature of daemons since the earliest of days when we saw Nurglings for the first time. However, for the other chaos gods, there are few analogues. Indeed, Nurglings were supposed to be the analogue of steeds -- given the tenuous associated with palanquins. These days, Tzeentch competes via screamers (with a stretch of the imagination), and via brimstone horrors