Ares ( the Major God of weapons and war) once secretly stole Zeus’ Master Bolt(the strongest Greek weapon ever to be forged), being the annoying nephew of Hades, he wanted to use it as a prank for Zeus, Poseidon and Hades to declare war on each other. Zeus had magically enchanted his Master Bolt to reinforce it so that if anyone other than him tried to behold it the lightening bolt would not react or not do nearly as much damage as it would if it was willing to. This infuriated Ares, he took his anger out by taking Hades’ Dark Helm. Hades noticed that his weapon was missing so he ordered his servants then figured out Ares had stolen his weapon. Hades was so enraged he picked up Ares, stormed to the edge of a cliff and dropped Ares whom plummeted hundreds of metres down( Ares wasn’t really affected by this since he was and still is an immortal being). Hades then retrieved his Helm of Darkness and returned to the Underworld to keep it under strict security ( Though he does wear his helmet a lot).
Some of Hades’ children are born with a gift/curse( It depends how they use it) that when they want to, the child of Hades or Pluto can summon rare and precious jewels such as diamonds and rubies to the surface of the earth. ( In, ‘ Heroes of Olympus’ it says that Hazel sort of absorbed the curse when she was younger. That was how a child of Pluto found out about the curse in Rick Riordan’s book. Although it can be extremely powerful at times, it is unbelievably rare as Hades is a brother of the big three.
