A nycar keeps a small subterranean lair, often accessed from an underwater entrance similar to the entrance to a beaver's den. Like a linnorm, it seeks treasure and hoards it in its lair. Much of its treasure is worthless trinkets and shiny baubles of little value, but by random chance one may discover a few valuable items over the course of its lifetime. A nycar usually sets simple traps and snares to protect its lair and treasure hoard while it is away or sleeping.