Anesidora

Velvet's Weapon is Velvet Scarlatina's weapon of choice. According to Coco Adel, Velvet's weapon was being "built up" all semester.

Description
Velvet stores her weapon in a small box that she keeps slung from her shoulder. The box is a large wooden chest. Golden metal bands cover the edges and Velvet's heart emblem is imprinted on the front. The box itself is about the size of Coco's Handbag.

During the events of "Breach", Velvet is preparing to use the weapon against the invading Grimm when Coco stops her, reminding her that she "spent all semester building that up" and urging her not to "waste it". This seems to indicate that the weapon is extremely powerful, and thus, should not be wasted. Alternatively, it could simply be a nod to the production team, teasing viewers with the weapon in the production diaries and building expectations of it being revealed during Volume 3.

In "Destiny", Velvet is seen using a camera from the box, taking pictures of Sun Wukong, Nolan Porfirio, and Brawnz Ni, along with Ruby Rose after her conversation with Ruby herself.

"Heroes and Monsters" reveals that the camera was a conduit that allows Velvet to copy the weapons of other fighters, using the photographs from the camera. These include Crescent Rose, Myrtenaster, Ember Celica, Gambol Shroud, Ruyi Bang and Jingu Bang, Magnhild, Coco's Handbag and Penny's Swords. The weapons that are summoned do not have the same coloring as the normal weapons; they instead look like holograms.

After destroying two Atlesian Paladin-290s, she proceeds to take a picture of Weiss Schnee's Semblance- a giant sword that was summoned.

Trivia

 * According to Monty Oum on the Volume 2 Finale Q&A Livestream, this was his favorite weapon in RWBY.
 * In "Heroes and Monsters", Velvet's attacks with Team RWBY's weapons were based on the attacks done in each of the corresponding character's Trailers.
 * The hologram versions of the weapons summoned from the box greatly resemble wire-frame models of the original weapons. A wire-frame is a way of rendering an object without textures of even faces in real time within a 3D design program.