Chaos-Ridden World

The "Chaos-Ridden World" is the unnamed world that is featured in LeanShake's game series of the same name. Home to four Chaos Gods who seek to wreak havoc and destruction on the land, the guild spent a few months there in 2021 helping defend an Empire against their evil forces.

Geography
The Chaos-Ridden World is not situated on the Reach but on either a different planet or even plane. Information on the world at large is limited, but the locations the guild visited seem to be fairly temperate and well-forested. Transportation to and from the world was facilitated by Viktor, a former Bright Dawn guildmember.

Defense of the Ostland Bulwark
In August 2021, former guild member Viktor convened a meeting with his former colleagues in his laboratory. He informed them of a world under the rule of four chaos lords—Khorne, Slaanesh, Nurgle, and Tzeentch—and their champion, Archaon, who was wreaking havoc in the northern territories with a demon army. Viktor's agents, Henry and Marissa, took the guild to Ostland, one of the besieged nations. There, the guild encountered Prince Innes and Princess Tana who assigned them the task of retaking a stronghold from the enemy demons, in which the guild succeeded.

The guild members returned to the reclaimed stronghold in the following September where they met Commander Tirado of Ostland. Tirado requested their aid in defending a border wall from Chaos-tainted barbarians. Sir Mortiz, a war priest of the wolf god Ulric, joined the fray with reinforcements, and the guild successfully repelled the invasion. Throughout the month, the guild continued to help, dismantling demon warcamps and enemy artillery stations. The guild eventually discovered that the Chaos forces aimed to destroy the Flame of Ulric, which would deprive all clerics of Ulric of their powers. Despite the guild's best efforts, however, all they could do was buy time for evacuations while the Chaos forces continued to push the Ostland forces continously back.

Eventually, during a defense of the Ostland Bulwark, the sky transformed into a kaleidoscope of colors, signifying the imminent arrival of the Chaos Gods. Faced with an overwhelming adversary, the guild orchestrated a retreat from the Bulwark, guiding the populace to safety. The Ostland forces withdrew towards Marienburg, where they tried to set up more defensible fortifications.

Viktor's Agents and Arlut's Involvement
Around this time, four of Viktor's agents—Nayra, Henry, Joshua, and Gerrick—disappeared in a strange city marked by a ruined cathedral and shrouded in fog. Due to Viktor teleporing the guild party involved directly to this location, it is unclear where on this world the city was located. As the party searched through the ruins, they found and rescued the lost agents, learning that a Slaanesh cult was behind the massacre in the city. The cultists were eliminated with the aid of Viktor's agents, and the agents were safely returned to Viktor.

The guild also learned that Viktor was concurrently facing attacks on his demiplane by an evil deity, Arlut. The guild undertook missions to assist him, during which they learned that Tirado had been abducted by Arlut, who seemed to be aiding the Chaos forces. It was later learned that Tirado was taken to the Veiloris Imperium and subsequently transformed into a demon to serve Arlut's will.

The Siege of Marienburg
Without Tirado, the Ostland forces continued to be pushed back and were ultimately cornered in Marienburg, where the demon army initiated a siege. Despite the guild's valiant efforts in defending one of the city gates, a different one fell, allowing demons to flood the city. As the guild and their allies fell back north to defend the Flame of Ulric, they found Prince Innes engaged in combat with Archaon near the city center, where Archaon announced his intention to destroy the entire world. The guild intervened, saving Prince Innes and vanquishing Archaon after a difficult battle. With their leader defeated, the demon forces were expelled, and the Chaos-Ridden World was saved for the time being.

Trivia

 * The "Chaos-Ridden World" bears extensive similarities to the Mortal Realms setting of the Warhammer Fantasy setting, such as the names of its locations and NPCs.
 * Despite the city that Viktor's agents were lost in bearing some resemblances to the Veil, such as the thick fog and numerous dead, LeanShake has confirmed that it in fact took place on the Chaos-Ridden World.