Kaecilius first appeared inStrange Tales #130 (March 1965), and was created byStan Lee andSteve Ditko. He appeared in several subsequent issues ofStrange Tales, ranging from issue #131 (April 1965) to issue #143 (April 1966). Kaecilius also appeared inDoctor Strange #56 (1974), the 2019 seriesValkyrie: Jane Foster #4 (2019), the 2021 seriesDeath of Doctor Strange, and the 2023 seriesG.O.D.S.[2]
Kaecilius is a disciple ofBaron Mordo who delivers messages for him and even fightsDoctor Strange himself if necessary. While battling Strange, Kaecilius successfully steals theCloak of Levitation. However, by the end of the battle, Strange uses his powers to erase Kaecilius' knowledge of magic from his mind.[3]
Kaecilius and his cohorts, Adria and Demonicus, pose as members of the Independent Video media network to interview Doctor Strange as a ploy to gain access to theSanctum Sanctorum. After being exposed, Adria attempts to use a powerful gem against Strange, but only manages to banish herself, Kaecilius, and Demonicus to the Purple Dimension.[4]
Many years later, the three are freed from the Purple Dimension and battle Doctor Strange as well asJane Foster in her new identity asValkyrie. Kaecilius displays vastly improved abilities and a modified appearance with darkened eyes.[5] During the battle,Grim Reaper appears, having been newly empowered byMephisto, and traps Doctor Strange's astral form in a mirror. Scared and surrounded by his defeated comrades, Kaecilius flees toParis.[6]During the "Death of Doctor Strange" storyline, Kaecilius accompanies Baron Mordo into heading to the Sanctum Sanctorum, where Doctor Strange is found dead.Wong accuses Mordo of killing Doctor Strange, which he denies. Just then, a classic version of Doctor Strange arrives, having sensed that the worst has happened.[7] This version of Strange is revealed to be a temporal remnant who was created years prior by the original Strange to avenge him in the event of his death. The remnant was created by Strange severing a week of his life, meaning that he will only live for a week.[8] After deducing that Kaecilius had killed the original Strange, the Strange remnant uses Kaecilius as a base for a spell that resurrects Strange, killing Kaecilius in the process.[9]
Kaecilius appears inDoctor Strange, portrayed byMads Mikkelsen.[1] A combination of several villains from the comics, Kaecilius was used in the film to drive the introduction and development of bigger villains for the future, includingDormammu and "certain individuals who live in other dimensions".[11][12] This version was motivated to become a Master of the Mystic Arts after the death of his family, and became disillusioned with what he considered theAncient One's hypocrisy, subsequently choosing to serve Dormammu by using the same life-extending ritual his former master used to channel theDark Dimension's energy. Believing in Dormammu's promise of eternal life, Kaecilius and his zealot followers destroy the Masters of the Mystic Arts'Sanctums to allow the Dark Dimension to consume Earth. However,Doctor Strange convinces Dormammu to renounce his attack on Earth, after which Dormammu drags Kaecilius and his followers into the Dark Dimension.[13][14][15]
An alternate universe variant of Kaecilius appears in theWhat If...? episode "What If... Howard the Duck Got Hitched?", voiced by Jared Butler.[16][17]
^ab"Kaecilius Voices (Doctor Strange)". Behind The Voice Actors. RetrievedApril 23, 2025. A green check mark indicates that a role has been confirmed using a screenshot (or collage of screenshots) of a title's list of voice actors and their respective characters found in its credits or other reliable sources of information.
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