Silver Fire (Forgotten Realms)
In the fantasy world of the Forgotten Realms, the campaign setting of the Dungeons & Dragons fantasy role-playing game, silver fire is one among the special abilities the Chosen of Mystra are gifted with.
Once per hour, a Chosen of Mystra can unleash from within his or her body a beam of magical whitish flame known as silver fire (which is also used as a general name for the overall power invested in each of her Chosen by the goddess). This beam is 5 feet (1.5 m) wide and can be made to extend as far as 70 feet (21 m) if desired. No magical or physical barrier has been discovered that can withstand it, and the beam inflicts tremendous damage on all beings struck by it. Any nonliving object touched by the beam is utterly destroyed. An individual also can choose to emit the silver fire in the shape of a cloud that fills a cone-shaped area five feet in diameter at its apex, up to 70 feet (21 m) long, and up to 70 feet (21 m) across at its furthest extent. This silver cloud causes no damage but banishes dead magic areas forever by restoring their connection with the Goddess of All Magic. This use of silver fire is extremely rare because Mystra considers it an emergency action only.
The silver fire can also be activated within the body of a Chosen to purge all external magical and psionic compulsions from that person. Also, once per day a user can teleport without error to the last location where he or she used silver fire in any of its forms.
Silver fire is composed of pure Weave Magic energy, and therefore the clashing of silver fire with the Shadow Magic would cause the multiverse to unravel, tearing the fabric of the world and causing huge dimensional rifts between the planes. This happened in Shadowdale in the Year of Wild Magic (DR 1372) when Elminster was fending off several invading shadow princes who were actually shadow-mattered creatures. His silver fire vaporized one of the shadow princes but also created a rift between Toril and the Nine Hells. Elminster jumped into the Nine Hells and sealed the rift from there, but that act also burned all his magical energies and left him helpless in the Hells; only with the help of the Simbul did the archmage finally escape.