The Hollow is a bladed weapon with a special compound that allows it to render itself invisible to human vision. It was a payment from a Japanese client after the Bolverk Squad performed a mission for him. It's uncommon length allows the user to execute mortal blows and with certain advantage.

Xionic Madness 1-2Edit

Xero is seen using to cut down various enemies throughout the first three episodes

Xionic Madness 3Edit

to be added

Xionic Madness 4Edit

to be added

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