they drop NOTHING An olm (Proteus anguinus) is a unique, blind, aquatic salamander living in European cave waters, known for its pale skin, frilly gills, and incredible ability to survive years without food, often called a "cave dragon" in folklore. It's the only fully cave-dwelling vertebrate in Europe, with highly developed senses of smell, hearing, and taste to navigate its dark, underwater world.
they are the only passive mob that burns in sunlight