Editing War of Beasts (section)

===Like Primarch, Like Chapter Master===
The Imperial forces were increasingly confronted with the possibility that they were going to lose. Chaos kept gaining ground, and the remaining relay stations on Neo-Vellum were warning that the Great Rift was expanding closer to Vigilus. Left unchecked, the world would be lost to the Warp and the entirety of the Imperium Nihilus with it.

Some among the Vigilus Senate brought up the prospect of Exterminatus, but Marneus Calgar reminded them that Guilliman told them not to abandon the planet under any circumstances. More importantly, the Chaos forces were still being weakened by the xenos and Imperial forces were still eking out victories here and there.

While seeking the aid of the Orks was out of the question, Calgar decided that an alliance with the Eldar of Saim-Hann would work to their mutual advantage. During a lull in the fighting, Calgar was able to call for a parley and meet with Farseer Keltoc. While Keltoc was still upset with the death of Autarch Rhyloor, the Farseer agreed that the Eldar could not afford for Vigilus to fall.

The exact details of the pact Calgar made with Keltoc are uncertain, but given that the Farseer and his senior chieftains were allowed into the Governor's Palace and that the Planetary Governor and the other members of the former Aquilarian Council who had a role in Rhyloor's death were never heard from again, it isn't difficult to figure out the terms. In exchange, the Eldar agreed to allow the Imperials the use of the stealth ship ''Vaul's Ghost'', which Calgar needed to carry out his plan to force the Black Legion's withdrawal.

The Eldar soon began to create a diversion for the Imperials, leading Orks into Chaos Space Marines strongpoints across Vigilus. While countless battles continued to rage, only Calgar, Keltoc, and a handful of Ultramarines commanders knew that only one - the battle for New Vitae Docks - mattered. Countless bulk freighters were sent into low orbit despite the Iron Warriors' best efforts to shoot them down. Most were decoys, but one of them was carrying a payload of six Deathstrike Missiles, including two Vortex Missiles. Meanwhile, the Imperial fleet had been hastily reassembled to engage the Black Legion's fleet, in the hopes that it would buy enough time for ''Vaul's Ghost'' to pick up the missiles.