Prelude in Violet/Mystery Box

The Mystery Box is a utility featured in Prelude in Violet, returning in an almost identical form from its Treyarch incarnation. First appearing in Schule für die Untoten, the box is a random weapon generator that selects from the pool of weapons available on a given map. After a short delay, the player can choose to swap for the given weapon or let it return to the box. It costs 950 points each use with the only exception being when a Fire Sale is active which drops the price to 10 points.

Usage
As a random weapon generator, the Mystery Box is a gamble as to what a given player will receive from it. The box pulls weapons from the selection available on the map, with exceptions for easter egg and power-up weapons. Through this, the player can receive wonder weapons, wall weapons, or equipment from the box. Once a weapon is generated, it will slowly descend back into the box until either the player picks up the weapon or the box closes over it. After a random number of uses, usually between 6-8 rolls, the Mystery Box will disappear and change locations to one of a number of spawns placed on each map. The box will never spawn in the start room of a map, as long as a spawn is located there, but will always be randomly located around the map. When a Fire Sale is active, all spawns gain an active Mystery Box that cost 10 points per roll.

Unlike previous versions of the Mystery Box, a unique mechanic exists in Prelude in Violet. Should a player receive a wall weapon from the box that had not been bought previously, the weapon will come through the wall at its chalk outline as though it had been bought off the wall.