diamond dreams takes place centuries after the cataclysm that ruined the ancient cities and the nether, and people are still cleaning up the mess here and there. ancient cities that become flooded release sculk into the water where it becomes an extremely invasive form of seaweed that beaches in huge piles on the shore, spreading psychic diseases to wildlife and people as it feeds from death. cleanup crews in hazard gear powered by brass-andesite tech (c.f. the Create mod) are called in to keep the threat under control.