This is the great, gobbling ooze monster from the Land of the Sandmen.

The ooze monster dribbles out from under the bed, making a sloshing noise as it does so. It resembles a disheveled Muk, but it is somewhat more watery. Instead of eyes, it has just holes. So how does it smell or see? It doesn't actually. What it does is shoot out radioactive blobs and track the radioactivity.

The radioactivity is slight enough that it won't kill or hurt badly, although it will sting a little, like if you dropped a drop of hydrochloric acid on your skin.