Erwin Schrödinger’s Cat Collar

Quantum Mechanics
Erwin Schrödinger was a physicist who made important steps in the advancement of quantum theory and helped in other fields of science. He criticized the the exploration for quantum mechanics, the Copenhagen Interpretation. It states that anything and everything possible could be happening at once, until a person observes something. Once that happens, the event seen becomes concrete and reality while the rest are gotten rid of. In response, he created the idea of Schrödinger's cat.

Schrödinger's Cat
If a glass of poison was connected to a radiation detector, it would detect a single atom decaying, which would release the poison. If the cat lived or died depended on one atom being different. But when not looking at the cat during the experiment, it is both alive and dead, showing how contradictory the Copenhagen Interpretation can be.

Effects
It is a red leather collar with a nametag that says 'Mipsy'. When worn or held, it will activate randomly, killing anything nearby in a 1-4 meter radius by making quicksilver materialize in their veins.