Alexander the Great's Bronze Breastplate

Origin
Alexander the Great was a Macedonian king and founder of the Warehouse system. Discovering the immense power of artifacts, he began conquering neighboring kingdoms to prevent tyrants from abusing their abilities. His land stretched from Greece and Egypt into Persia and India, controlling most of time’s known world. On his return home, he mysteriously fell sick and died 11 days later in Babylon. His empire quickly dissolved into separate kingdoms after his death. However, his death was faked and Alexander found his way back to the Warehouse, now immortal and working as an agent in its current incarnation.

Effects
Absorbs and redirects various forms of energy, such as kinetic energy, electricity, and heat. If worn too long without releasing the absorbed energy, it will build up and become very unstable, leading to the artifact and it's wearer exploding. The artifact would survive the explosion because it would just absorb any energy that would destroy it.

If worn for more than twelve days, the wearer will become poisoned. A way to bypass this is to wear the breastplate for eleven days, go one day without wearing it, and the wear it again the next day.