Kavrix is a world that calls heroes out of other worlds and then leaves them to work it out. Every ten years the kingdoms hold a formal Summoning Ritual and the champions who arrive are registered, ranked and put to work. In between, the walls between worlds thin on their own and people fall through unannounced. Some of them are heroes. Some of them are not.

Two kingdoms hold the south. Aertos runs on old magic, careful law and long memory. Solara runs on machines, research and speed. They need each other and they cannot stand each other. North of them the land turns hostile, a desert where demons trade in debt, mountains full of dwarven holds, and an ice field where the dead outnumber the living.

Three powers want the world reshaped. Valerius wants absolute order. Xylos wants everyone in his debt. Aethelred wants everything to stop moving. Older than all three, the Unmaker sits sealed under Mount Thornmaw, and the seal is over a thousand years old.

There are no dice here and no numbers. Every action either works, works at a cost, or fails and makes things worse. What decides it is whether your character has a reason to succeed.