Fidus Kryptman - Tarsis Ultra: Less than five Terran years after the defeat of Hive Fleet Kraken in the Second Tyrannic War, Inquisitor Lord Kryptman noted the tell-tale signs of yet another Tyranid invasion of the galaxy in 997.M41. He implemented the Kryptman Census, burning out dozens of astropaths in the attempt to contact scores of worlds on every fringe of the Imperium in an attempt to divine the location of the new Tyranid invasion's entry vector.Slowly, the responses -- and lack of them -- formed a pattern, and the venerable Inquisitor was able to chart the course of the Tyranids' latest Hive Fleet to arrive in the Milky Way Galaxy. Codenamed "Leviathan", this time the Tyranids were approaching from below the galactic plane, attacking from two points spaced wide apart in the shape of a closing pair of jaws, cutting off large portions of the galaxy from Warp travel or astropathic communication.In 999.M41, at a great cost in human life, a combined force of Planetary Defence Force troops, two regiments of the Imperial Guard, the Ultramarines and Mortifactors Chapters of Astartes, and a Deathwatch Kill-team under the command of Inquisitor Kryptman himself crushed the left "half" of Hive Fleet Leviathan on the world of Tarsis Ultra.Inquisitor Kryptman became involved in the defence of Tarsis Ultra in 999.M41 when a tendril of Hive Fleet Leviathan was discovered to be moving towards the planet. Imperial forces arrived to defend the world, which consisted of the Ultramarines 4th Company led by Captain Uriel Ventris, a detachment from the Mortifactors led by Chaplain Astador, the 10th Logres Regiment led by Colonel Octavius Rabelaq, the 933rd Death Korps of Krieg Regiment led by Colonel Trymon Stagler, and the Tarsan Planetary Defence Force regiments headed by Major Aries Satria.Kryptman was on hand to share his extensive knowledge of the Tyranids with the commanders in aid of the war effort. He was also accompanied by Magos Biologis Vianco Locard, an expert on the Tyranids, and a Deathwatch Kill-team led by Captain Bannon.Despite an initial victory in destroying a Hive Ship during a void battle, Inquisitor Kryptman wished to invoke Exterminatus upon the world of Chordelis, the next planet in the path of the Tyranids. This was to prevent that world from being devoured and swelling the Tyranids' numbers, as planetary evacuation was too slow.Captain Ventris vehemently opposed this decision and supported an alternative solution proposed by the Imperial Navy's Lord Admiral Lazlo Tiberius, to slow down the Tyranids by exploding a hydrogen-plasma refinery in space to destroy another Hive Ship. However, Kryptman had lied to Ventris and with the assistance of the Mortifactors Astartes invoked the Exterminatus anyway.During the repeated Tyranid attacks on Tarsis Ultra, Kryptman, along with his retinue, studied the biology of the Tyranid corpses killed in combat. During one expedition, a Lictor which had earlier landed on the planet, attacked his team but was fended off by the Deathwatch; Kryptman immediately ordered Captain Bannon to capture the Lictor without killing it, which they did.This proved pivotal to the war, as Magos Locard was able to concoct a poison from the Lictor's genetic structure that would allow the Imperials to defeat the entire swarm by infecting the Tyranid Norn-Queen, the source of all the swarm's bioforms, aboard the last remaining Hive Ship commanding the tendril of the Leviathan attacking Tarsis Ultra.The Deathwatch team, led by Ventris, accomplished this mission, ending the war shortly before the few remaining Imperial defenders were overwhelmed by the Tyranid swarms.The Imperium had won its first victory against the third Tyranid assault upon the galaxy, destroying the Tyranid swarms nearest to Terra, and reestablishing astropathic contact with the worlds between the Leviathan's jaws.