Randomized according to fixed rules. Now imagine not needing to write those rules / not being bound by them. Consider generative ML coming up with whole new cat

Randomized according to fixed rules. Now imagine not needing to write those rules / not being bound by them. Consider generative ML coming up with whole new categories of monsters. Consider a Nethack variant that was never told to include a candelabrum or Amulet of Yendor.