Ten worlds, one road
Haven's Rest is the safe hub, and every portal out of it costs you something in exchange for what it leads to. The frontier worlds have a foothold and a way home. The four beyond them have neither — no settlement, no bank, no safety, and they never will.
Every ground colour above is the terrain that world is actually made of, painted by the same code that paints it under your feet.
What lives where
Every Beast that spawns in each world, read from the running server rather than typed. Ordinary Beasts do not scale with you: outgrowing a world is the point.