Bolothrax
Bolothrax is a Great Unclean One of Nurgle who was one of the masters of the Daemon Tide in M33. The Daemon Tide overran three Imperial Sectors, until it was finally defeated by five Knight Houses on the world Godsmote.
The Knights were led by House Terryn's High Queen Desmadara Terryn and the Daemon Tide's defeat led Bolothrax to develop an unending grudge against Terryn and all of its descendants as well[1a]. Sometime after the Great Rift's creation, Bolothrax was able to enact his revenge, when High King Tybalt led Terryn's Knights and the Raven Guard Chapter against the Tau Empire on Shans'et. Tybalt had sought to reclaim the former Imperial world from the Tau, but this ended when Bolothrax caused black rain to fall upon Shans'et, which rotted away all that it touched. The rain soon made a morass, from which Bolothrax and an army of Nurgle's Daemons emerged from and the Great Unclean one lead them in an attack against House Terryn. In the vicious clash that followed, House Terryn suffered terrible losses and the vengeful Bolothrax was able to personally wound High King Tybalt. Bolothrax is also able to kill three of Tybalt's closest blood relatives, but before he can destroy the Knights, the Raven Guard lured the Tau Empire's forces into the battle. The sudden influx of new foes allowed the Knights of House Terryn and the Raven Guard to escape off world and left Shans'et to the frustrated Daemons, who wasted no time in making the Tau suffer.[1b]
