Deacon Frost was allegedly a scientist looking for the key to immortality. For one of his experiments, he kidnapped a young woman in order to inject his victim with the blood of a recently killed vampire. The girl's fiancé broke into the lab, and Frost was accidentally injected with the blood himself. The result was that Frost became a vampire but he was endowed with a unique characteristic; anyone he turned into a vampire would generate a doppelgänger. He could create an unlimited number of doppelgängers by biting each doppelgänger, and they would all be under his mental control. Frost intended to use this ability to contend for the position of Lord of Vampires, a position that was presently held by Dracula. Frost is the vampire responsible for the death of Blade's mother; Blade's initial mission is to exact revenge against her killer. It was also Frost who turned Hannibal King into a vampire. Blade and King eventually teamed up to fight Frost's army of doppelgangers of Blade and King. The two of them managed to defeat and apparently destroy Frost in his underground hideout, stabbing him twice and leaving his body to be consumed as his hideout exploded. Many years later, Blade encountered a vampire that called itself Deacon Frost. This vampire had a different appearance and personality to the original, and was later identified as being a doppelgänger. The doppelgänger attempted to summon a powerful demon, only to be devoured by said creature. In a later one-shot story set in New Orleans, Frost was encountered yet again, but he appeared as he did in The Tomb of Dracula. He also confirmed that the previous encounter was indeed an imposter who was created using science and magic. Blade and King, with the help of Brother Voodoo, foiled Frost's attempt to gain control of Garwood Industries through Donna Garth. Frost escaped this encounter vowing revenge. More recently, Frost appeared at the summons of Dracula to defend the Lord of Vampires as he underwent a magical ritual, only to be staked by Blade.
Other versions
Earth-9991
While roughhousing, two boys enter the parking garage where Frost is located with his latest creation, a monster called the White Worm. Frost sics the White Worm on the children, then flees when he senses the approach of Blade.
The Ultimate version of Deacon Frost appears with a youthful appearance. He has been captured by S.H.I.E.L.D. in order to convince Blade to join Nick Fury's Black ops team.
In other media
Television
Deacon Frost appears in Marvel Anime: Blade, voiced by Tsutomu Isobe in the Japanese version and by JB Blanc in the English Dub. This version is the leader of an organization he created called Existence, whose membership comprises hordes of vampires, most of which have been genetically altered by his science to make them more powerful, and humans who have been deceived into helping them in exchange for fulfilling their own desires. Frost is known as the four-fanged vampire and famed as powerful even by vampire standards. With his organization greatly spreading its influence in Asia, this puts him in conflict with the council of pure-blood vampires who have ruled Europe for many centuries. While responsible for many tragedies surrounding Blade and others, Frost suffered his own tragic event while human. Having witnessed his son Edgar killed by a vampire and further infuriated by corrupt police that were not looking into the case, Frost decided to research vampires with the help of many vampire hunters he hired with the purpose of turning himself into a stronger breed of vampire. This ultimately motivates Frost's goal to wipe out the old vampire race, then rule the world with a race of genetically altered vampires created from Blade's own Daywalker blood. Deacon Frost has done experiments on the Mandurugo, the Manananggal, and the Sundel bolong. By the end of the series, Frost drinks the blood in his daywalking vampires to assume a stronger form, but is slain moments after in a final showdown with Blade, using his mother's and Makoto's silver weapons.
Film
Deacon Frost appeared as the main antagonist of the 1998 film Blade, portrayed by Stephen Dorff. This depiction was a younger and more updated version for the 1990s while retaining his upstart ambitions. His main objective was to become the vampire God La Magra and rid the world of humans, believing the planet belongs to the vampire race. After killing the House of Erebus' leaders as part of the ritual, Blade and Karen Jenson spoiled Frost's plans. Despite their efforts however, Frost managed to complete the ritual and be one with La Magra, engaging Blade in a sword battle. During the fight, Blade managed to gain the upper hand, cutting off Frost's right arm and then proceeded to cut him in half, only for Frost's top half to re-connect and regrow his right arm. But after a stand-off, Frost was finally killed by Blade's use of EDTA darts which caused him to explode.
In October 2008, Blade director Stephen Norrington was confirmed to be developing on a prequel trilogy to Blade, featuring Stephen Dorff reprising his role as Deacon Frost. However, in 2012 the rights for Blade returned to Marvel Studios.
Video games
Deacon Frost appears as the main antagonist on the Blade table in Marvel Pinball.