A millennium has passed since Kavlov imprisoned the demon Balthazar deep beneath the earth, binding themselves within the Halls of Dread to guarantee their success. However, as Kavlov's power fades, so does the demon's prison. Do you have what it takes to stop the ritual circles from being activated and prevent Balthazar's escape? Or will you take on the role of the villain, seeking to unleash untold destruction on the world by freeing the demon from its bonds? 

Explore the dread-filled halls of Kavlov's Sanctuary and uncover the ancient secrets and betrayals that could determine the fate of the world. But be warned, your actions have consequences, and the ultimate battle between good and evil is closer than ever before! 

What is Kavlov's Sanctuary? 

Kavlov's Sanctuary is a campaign module and adventure sandbox created for Old School Essentials. The module is designed with extended play in mind, prioritizing a detailed and immersive setting filled with lore, NPCs, and hooks over a predetermined adventure or rigid plot. It serves as a foundation for game masters to create their own adventures, providing ample opportunity for customization and player-driven exploration. 

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