The planet Adrilles has an equatorial diameter of 96,456 km. Its orbit around its sun takes 687 days.
History – Necron
Long before Man had crawled from the muck of ancient Terra, the planet Adrilles was home to two Necron dynasties– Rubicon and Sautekh. The rivalry between these two was so great that it eventually erupted into all-out war. This war was so vast and costly that the victorious Sautekh dynasty entered into stasis after its rivals had been defeated and exiled.
The exiled Rubicon Dynasty wandered the stars for tens of thousands of years. During this time, its leader, Trazyn the Infinite, gathered others who shared his ideals and his distrust of his enemy. In time, Trazyn returned to the planet with the intent of once again waging war and wresting control of the planet from his ancient foe. But when he and his forces arrived at the planet he learned that his rival had gone into stasis. Deep below the surface, the enemy slumbered in tombs.
Trazyn’s ire was so great he unleashed the full force of his might. He cracked open all but one of the Tesseract Vaults3 in his army. His hope was that the unbridled fury of Transcendent C’Tan4 would be such that the planet would be annihilated. That did not happen, but the force was great enough to tear great swaths of rock from the surface.
Trazyn knew his enemies were not destroyed. So he too entered stasis. The last of his power was used to assemble a tomb of rock about his forces. He created a small moon from the shattered pieces of his own homeworld. There he would sleep until he felt his rival awaken, at which time Trazyn will wake with the remains of his own host so that he can once again meet his foe in combat.
History – Imperium
Millennia later, the planet Adrilles was settled by the Imperium and would remain a beacon of civilization for centuries until the coming of the Tyranid scourge.
The planet upon which the Adrilles War was eventually fought is one of a hundred worlds abandoned by the Imperium as part of Kryptman’s Gambit1. In an effort to slow the advance of Hive Fleet Leviathan2, Inquisitor Kryptman had hundreds of worlds either evacuated and razed or, if already under attack, abandoned and left to a horrible fate. Adrilles was one of those already being ravaged by the Tyranids of Hive Fleet Leviathan. Local garrisons fought to the last while the planet’s citizens cowered and wondered why the Imperium had abandoned them.
Magister Militum Frans Ruldolf and the Jager Corps came to the lifeless Adrilles and found it ideal for their experimentation with psychic powers in regards to developing and controlling Tyranids. After years of searching for an ideal location among the worlds abandoned by Kryptman’s Gambit, the Jager Psykers under the guidance of Grand Librarian Hoeth discovered Adrilles because of its unique and powerful psychic emanations. The machinations of the Librarians and Psykers under the command of Magister Militum Frans Ruldolf further amplified this weave of psychic energy– a volatile mix of Tyranid caused Shadow of the Warp, atmospheric anomalies caused by latent C’Tan power dating back to the Rubicon / Sautekh war, and the newly introduced psychic manipulations of Hoeth and his cadre. This ever-increasing psychic and atmospheric volatility soon awoke the slumbering Sautekh Necrons. When these once victorious Necrons arose soon too did Trazyn and his forces. The seismic upheaval caused by the rising Necron tombs further destabilized the planet and its atmosphere.
What was once a harsh but fertile and prosperous planet within the Imperium was a cracked and barren husk when the Jagers Corps arrived. Scoured clean of all life by the Tyranids, the planet was abandoned by Hive Fleet Leviathan when biomass ran dry. The Tyranids left behind soon died out, decomposing where they lay or, in some cases, returning to the reclamation pools.
Crumbling capillary towers5 still scratch at the sky. Reclamation pools6 bubble, suggesting life waiting to be reborn. In places where great cities of Man once stood now only remains rubble and hollow shells of former architectural glory. Old battlefields are littered with the destroyed machines of the Imperium.
The northern hemisphere is the harshest of environments. All that remains are the volcanoes and vast steam vents that had once powered the great Forges of the Imperium. Channels of lava cut across the black and barren surface. The ground shakes, as if angered by the harsh treatment it has endured. The massive and deep Klendathu Canyons is found in the northern hemisphere, but in a less volatile region where volcanoes fell silent tens of thousands of years earlier.
In the south, the mountains are the highest. The slopes are jagged and steep, rent at times by large chasms, like strokes made from some god’s molten axe.
The east and west hemispheres were once comprised of sizable continents surrounded by seas. The Imperium had been taking everything it could from inside and from below those waters when the Tyranids descended. No water remains. Great seabeds are now exposed rock. What were once underwater trenches are now merely more mountains and canyons.
There is little trace of the Necron dynasties that waged war on the planet long before the Imperium settled its surface. If the Imperium had uncovered Necron artifacts, the information and those artifacts were lost when the Tyranids came.
What is known now is that the Sautekh Necrons retreated into their tombs which either existed below ground or were taken below ground. Many of the Necron tombs were destroyed when Trazyn unleashed his fury upon returning to the planet, but others survived, including the tomb of the dynasty’s leader. That tomb was encased in the great swath of rock that became the planet’s largest moon.
As the remaining Necron tombs became active, they rose to the surface. The Necrons that spilled from the depths started to sweep across the planet, seeking destroyed and damaged tombs and other artifacts of their dynasty.
Hurricane force winds can ravage large areas of Adrilles for months on end. These winds and the loose sand and rock it picks up and hurls are responsible for the erosion of the planet’s devastated surface following Trazyn’s fury. By the time the Imperium arrived, there was little evidence that the moons had once been part of the planet itself.
When the hurricane winds aren’t blowing, Adrilles is still never calm. There is always a strong wind. It can carry with it bitter cold or uncomfortable heat depending upon the season and the hemisphere.
When Magister Militum Frans Ruldolf and the Jager Corps came to this planet, its atmosphere was ravaged not only by hurricane-force winds but also a chaotic mix of Warp and remnants of Shadow in the Warp7. This creates an isolating effect that has kept Jager Corps’ experiments hidden, but it also seems that the Corps’ psychic manipulations are contributing in some way to the chaos of the planet’s atmosphere.
This strange effect did not exist when the Imperium initially settled the planet centures ago. It has been suggested the problem started when Hive Fleet Leviathan arrived and waged war on the planet. Why it persisted after Leviathan abandoned the planet is currently up for debate.
Klendathu Canyons – The Klendathu Canyons are a vast system of canyons covering 10,256.24 km2 in Adrilles’ northern hemisphere. The north is predominantly volcanic territory high in tectonic activity, but the region covered by the Klendathu Canyons is one of dormant, collapsed calderas and rents as deep as 30 km. During the Adrilles War, the canyons were the site of numerous battles, including three days of viscous fighting between Chaos Daemons and Tyranids. Those battles became known as The Klendathu Three.
The Volcanic North – The northern hemisphere is one of volcanoes and vast steam vents that had once powered the great Forges of the Imperium. Channels of lava cut across the black and barren surface. The Jagers had established several stations in this region, a place rich with energy that could be harnessed to power Jager operations in the area and beyond. It is also a region in which Tyranid Capillary Towers scratch at the broiling sky. The area was also one in which several Sautekh tombs rose to the surface. Indeed, after The Battle of First Contact the volcanic north was a region that remained firmly in control of the awoken Sautekh Necrons and their daemon allies.
Southern Mountains – The southern, mountainous region saw very little fighting during the Adrilles War relative to other regions of the planet, but it was the one place where the Vlka Fenryka were able to establish a sizable and defensible stronghold.
The Seabeds – The western hemisphere of Adrilles had once been dominated by a vast ocean surrounding a continent fringed by flora choked islands. When the Jagers arrived none of that remained. The islands and the continent were dead, nothing but exposed rock wearing the deep scars of unimaginable violence. The ocean, too, was gone. The seabed was discernible from the rest of the wasteland only because of its altitude. It was in these rocky plains that the Jagers established numerous recon stations and a supply depots. The ancient seabed is also home to the so-called Tyranid Fields, a region on the eastern edges of the western hemisphere where the seabed meets the continental plate. It is in Tyranid Fields where the Jagers established their largest and most successful research stations.