Kabal of the Poisoned Fang
They are responsible for awakening Hive Fleet Hydra when they stumbled across its dormant Hive Ships. They foolishly boarded them seeking to acquire new specimens for their Kabal's Haemonculi. However, all who boarded were quickly overwhelmed and butchered by the extreme rate of the Tyranid creatures awaking to protect their ship. The remaining Kabal fleet attempted to flee but was also overrun by the awakening beasts.