Dragon's Breath

The Dragon's Breath is a variant of the SPAS-12 shotgun only found in Call of Duty: Black Ops Campaign.

Call of Duty: Black Ops
The Dragon's Breath is only available in the Campaign level "The Defector". The differences to the normal SPAS-12 include the usage of incendiary rounds which will burn enemies struck with the rounds. The weapon is extremely powerful, only needing one shot to hit an enemy to kill, even at its maximum range. Killing ten NVA soldiers during "The Defector" with the Dragon's Breath will earn the "The Dragon Within" achievement/trophy for PS3, PC, and Xbox 360.

Zombies
In Zombies, the Hades shotgun, the updgraded variant of the Olympia, also fires incendiary rounds. The incendiary rounds fired by the Hades behave exactly the same way as the Dragon's Breath shotgun. However, the flames only take effect after the zombie has been killed. The SPAS-12 becomes the SPAZ-24 upon being upgraded, however.

Achievement/Trophy
The Dragon Within (15/ Bronze Trophy ) - Kill 10 NVA with Dragon's Breath rounds.

Trivia

 * The Dragon's Breath SPAS-12's crosshairs do not move, unlike the regular SPAS-12.
 * Dragon's Breath is extremely powerful, as a single shot can destroy a car. In that manner, Dragon's Breath is similar to the Model 1887 from the mission Vorkuta. In Zombies, Dragon's Breath is able to potentially (assuming it is a direct hit) kill a zombie in one shot up to round 18, or round 36 if playing with Double Tap 2.0 equipped. Interestingly, the fire effect only appears after the zombie has died, but in Black Ops II, the zombie simply explodes rather than collapse in flames.
 * Despite the Dragon's Breath rounds setting enemies on fire, they do not seem to actually die from the fire as they still retain their regular death animations and do not burn to death, unlike the flamethrower.
 * The game performs the player's first kill with Dragon's Breath rounds in slow motion, for dramatic effect.
 * Dragon's Breath was originally planned as a SPAS-12 attachment in Multiplayer, but Treyarch was unsatisfied with the balance and performance of the proposed attachment and removed it.