A radiation filled biome that is VERY dangerous, and netherite armor is recommended for this one. Uranium can be found in this biome but is risky to mine. Waste, a radioactive liquid that is only found in this biome and should NOT be swam in. On the ceiling, there can be radglass, radglass is a source of uranium which you have to put it in a furnace to get it. And there is something lurking within...

Uranium

uses for uranium:

nuclear power

uranium is like redstone but more powerful and dangerous, it can still activate redstone-powered machines but it's more effective, pistons will push 2 blocks instead of 1 block, dispencers and droppers shoot with more force, and redstone lamps will glow brighter

radioactivity

using uranium is risky, because it's radioactive. It adds 2 new effects, radiation poisoning and cancer, you get radiation poisoning if you're near redstone or uranium, even holding it gives you it. you get cancer if you had radiation poisoning for 10 minutes.

RADIATION POISONING AND CANCER CANNOT BE CURED WITH MILK