Asuma's Chakra Blade from Naruto

Asuma Chakra Blades are trench knife-style weapons that Asuma Sarutobi uses in the Naruto series. They are designed to be worn like brass knuckles, with a distinctive zigzag blade that gives them a "teeth-like" edge. These blades are made of a special metal that can be infused with chakra, allowing Asuma to extend their range and increase their cutting power.

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