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"Thunder Ryu's Weapon" is the ninety-third trading card, and part of the Design Materials set. Only during a New Game +, it can be obtained by digging within Santa Destroy anytime after purchasing the Accelerator from Naomi's Lab. It is a weapon card depicting concept art for the D.O.S., the weapon used by former professional wrestler turned Yakuza, Thunder Ryu, from early in the development of No More Heroes.

A beam katana made by an infamous Japanese hitman. It's main distinguishing feature is that it has no off switch. Activates the instant it is removed from its recharging scabbard. Getting it safely back into its scabbard after use is probably the hardest part.