Persephone's Gift

Origin
Persephone's Gift is a powerful katana-like sword gifted to Hades by Persephone with the ability to send all it slashes to Tartarus, with the intention of Hades using it to fight his brother Zeus and Posideon. However, Hades not wishing to harm his brothers, meet up in secret with Hephestus, and had Hephestus shattered the sword. Hades then had Hermes scatter the shards throughout several layers of the Underworld to be protected by several guardians.

Season 1
Xylo and Austin discover the shattered Persephone's Gift in the Cavern of Erebus. Xylo then journeyed through the depths of the underworld to defeat the guardians of the sword shards and restore Persephone's Gift in preparation for Bryan unleashing the Titans. At the end of Season 1, during Xylo's battle with Brick, Xylo gave Brick the sword who then used the sword on Xylo and sent him to the Underworld.

Season 2
Brick somehow lost Persephone's Gift during the time Xylo spent in the underworld, but of course, found it lying around in camp with a sign on it returning it to the original owner. Brick then challenged Xylo to a fight and lost to Xylo, whom then reobtained the sword and later shattered it again with the help of Inpu's shadow arm.