Hive Fleet Pishacha is believed to have been formed from the remains of Hive Fleet Behemoth and now tears through the Segmentum Ultima, consuming, growing, gaining strength. Though it lacks the size and uses the tendril formation much like later Hive Fleets, Pishacha is dreaded due to its unusually aggressive (even for Tyranids) tactics, obviously acting on Behemoths old instincts. Pishacha is famed for its sheer speed and force, crashing against the enemies ranks with endless swarms smaller Tyranids.