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Mailbreaker is a type of dagger used by the assassins that are members of the Eight Fingers organization.


Mailbreaker is a weapon originating from the New World. They are used by Eight Fingers' assassins to silently kill off Sebas Tian without the latter noticing their presence from behind him.[1]


Brain Unglaus noted that these weapons look like a double-edge sword in the shape of a dagger.


There were reservoirs carved into the blades of this weapon and said reservoirs reflected the oily glow of a dangerous liquid. Mailbreakers were weapons specialized for thrusting attacks. It is also the kind of ranged weapons thrown at their specific target from afar.


  • In the real world, it is a parrying dagger a type of small handheld weapon from the European late Middle Ages and early Renaissance.


  1. Overlord Volume 05 Chapter 4: Congregated Men
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