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Quantum Entanglement Device

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Q.E.D. third person view BO
Quantum Entanglement Device
Cost (Zombies)

950 (Mystery Box)

Starting Ammunition


Maximum Ammunition


Fire Mode


"Oh how I love a good gamble! But only when I win."
Edward Richtofen after receiving a "good" effect from the QED.

The Quantum Entanglement Device,[1] often abbreviated to QED, also called the Richtofen Device by its inventor Edward Richtofen, is a secondary tactical grenade appearing on the Zombie map Moon in Call of Duty: Black Ops.

When thrown, the QED is capable of creating many different outcomes. Upon toss, the player will spin the handle on the bottom once, and push it in. It can either "curse" or "bless" the player, with outcomes such as extra weapons, extra perks, more enemies, or a reset of points.


The Quantum Entanglement Device can only be obtained through the Mystery Box and takes up the player's secondary tactical grenade slot. It is one of two tactical Grenades on Moon, the other being the Gersch Device. The player cannot possess both; if the player attempts to take the Gersch Devices, any remaining QEDs will be swapped and vice versa. The effect of the grenade is completely random, and there is no known way of getting a certain outcome.

The device's effect is always randomized except in an instance where it is used against an Astronaut Zombie; if a QED goes off near one, it will always create an explosion capable of killing zombies.


  • An explosion identical to that of the Astronaut Zombie.
  • Produces a Ray Gun that fires in a circle.
  • Produces a China Lake that fires in a circle.
  • Produces a fully automatic M72 LAW that fires in a circle.
  • Produces a black hole like the Gersch Device.
  • Produces a fully automatic Python that fires in a circle.
  • Produces a fully automatic SPAS-12 that fires in a circle.
  • Produces a CZ75 with Full-Auto and/or Dual Wield that fires in a circle.
  • Revives a teammate.
  • Spawns a power-up that will give the player any random, possibly Pack-A-Punched weapon, available on Moon, including QEDs or Gersch Devices; replaces the current weapon equipped if picked up.
  • An explosion similar to those produced by Matryoshka Dolls, blowing up rapidly within a certain radius many times.
  • Opens or closes a door if near one.
  • Lightning similar to a Wunderwaffe DG-2 shot.
  • Explosion similar to a Scavenger shot.
  • Spawns an ordinary Frag Grenade.
  • Spawns a Semtex grenade.
  • Teleports the user and/or their teammates to another spot on the map.
  • Spawns a random power up, such as Carpenter or Nuke.
  • Converts all zombies within a certain radius into humans like ones produced by the V-R11.
  • A Bonus Points power-up spawns.
    • White/Blue: gives the player that grabbed it a certain amount of points.
    • Green: gives a set amount of points to all players.
    • Red: reverts all point totals to zero or takes away a certain amount of points.
  • Spawns a Fire Sale power up.
    • Green: normal effect.
    • Red: spawns the Mystery Box far from the player's location and doubles the cost to 1900 points.
  • Spawns a red Random Perk Bottle power up which causes all players to lose a perk randomly.
  • Spawns a Max Ammo power up.
    • Green: normal effect.
    • Red: steals a full ammo magazine.
  • Spawns more zombies, which produces a whitish flare.
  • Downs all players within a certain radius.
  • Gives a Max Ammo power-up and a Death Machine.
  • Gives everyone in the area a Pack-A-Punched version of their current weapon.
  • Gives the player an Un-Pack-a-Punched version of their currently Pack-a-Punched weapon.
  • Gives all players a free perk.
  • Nothing.



  • If the Zombies run over a "blessing" given by the QED, the players lose it with no way to recover the power up. If the Zombies run over a "curse", however, then the negative effect will still happen as if a player grabbed the power up.
  • It is possible to obtain a QED from a random weapon drop.
  • The Quantum Entanglement Device also appears in Black Ops II's campaign mode.[citation needed]



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