With their leader dead, the Orks on Ghorala collapsed into infighting and became easy prey for the Tyranids. Each tribe was isolated and destroyed in quick succession until, within weeks, all the Orks on Ghorala had been killed. The bio-resources of the planet were turned into new bio-ships and the Tyranid infestation quickly spread to nearby Ork worlds.1
Octarius
On the central world of Octarius, the Overfiend of Octarius, after hearing about Orrok, marshalled the tribes and prepared the defences. When the first wave of Mycetic Spores arrived at the planet days later, a great cheer went up from the gathered Ork hordes who were itching for a great fight. Much of the battle took place in the skies and so much ammunition was fired into the air by Ork Quad-guns and Flakka-Dakka Guns that the rain was thickened by chunks of falling Tyranid flesh. Then from the west the black storm clouds drew closer and closer until they were revealed to be swarms of advancing Gargoyles. Ork Deffkoptas, Fighta-Bommers and Stormboyz roared into the air in a race to intercept the oncoming creatures. Dead Orks, burning wreckage, and hissing Tyranid ichor rained down everywhere.2
The Ork Boyz on the ground below began to climb the slopes, holding their Choppas high and intending to jump into the fray if only they could. Then suddenly the ground burst up and Genestealer broods flowed out of the tunnels. But the responding green tide of Orks quickly pushed them back into the crevasses and then plunged in after them. Meanwhile, Lictors scaled the mountainsides and stealthily silenced each Ork gun emplacement in turn. With the large guns down, the rain of Mycetic Spores doubled in ferocity and more and more Tyranids landed on the mountain passes to be met by equal numbers of Orks. Never before had Octarius seen such bloodshed, and the war soon spread from Octarius out to the entirety of the Octarius Sector.2
Escalating War
The Octarius war is continuing to escalate. In 997.M41 several Eldar warhosts entered the war, fighting against both Imperial and Ork forces.4 In 990999.M41 many Imperial Worlds were caught in the crossfire as the Saim-Hann Eldar entered the war, and the Raven Guard, White Scars and Salamanders Chapters united to defend the embattled planets.6 Recent reports indicate that the Tyranid Swarmlord has joined the assault on the Orks of Octarius.1
Whether the Orks or the Tyranids win the war, the victor will emerge stronger than before. Orks from lightyears around are flocking to Octarius, and are growing bigger and stronger on their diet of conflict. And every Ork devoured gives more biomass to the growing Tyranid swarm, which is constantly learning and adapting new ways to defeat their foes. Kryptman succeeded in luring Leviathan to the Octarius Empire, but rather than tricking both sides into destroying each other his plan backfired into starting a series of events that is making the Imperium's enemies stronger.1