Myrtenaster is Weiss Schnee's weapon, a Multi Action Dust Rapier. Myrtenaster is highly durable, slashing away at the Giant Armor with no visible wear on the blade.

Myrtenaster's most prominent ability lies in the revolver-like mechanism held within the hilt, which contains various colors of Dust, activated by a trigger on the underside of one of the prongs. The mechanism can be opened on a hinge, allowing Weiss to replace empty vials. As a result, the weapon appears to have no tang.

RWBY Wikia: http://rwby.wikia.com/wiki/Myrtenaster

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