Xanxus's box weapon is the Sky Storm Liger: Ligre Tempesta di Cielo, which has the attributes of both Sky and Storm.
Xanxus closes his box and orders Sil to call Byakuran. Sil hints that he's open to negotiating, but he is actually buying himself time to attack Xanxus, who is not using a box weapon at the moment. Sil uses his box weapon, Storm Bat: Pipistrello Tempesta, to surround Xanxus, and plans to attack him with special invisible storm flames. But in the next moment, the Storm Bat is crushed by a beam of light! It is Xanxus's flames of rage which were fired from his twin pistols. Even without his box weapon, Xanxus's fighting power is unfathomable! ...more