|**Kaecilius Chronology**|||||

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|Marvel Age Introductions by On-Sale Date|||||
|1964|DEC 10|STT130B|Strange Tales|[Doctor Strange][Dormammu] [Sen-Yu] [Kaecillius][Baron Mordo]|
|1965|JAN 12|STT131B|Strange Tales|[Doctor Strange][Baron Mordo][Dormammu] [Kaecilius]|
|1965|APR 8|STT134B|Strange Tales|[Doctor Strange][Clea][Dormammu][Baron Mordo] [Kaecilius]|
|1965|MAY 4|STT135B|Strange Tales|[Doctor Strange][Dormammu][Baron Mordo] [Kaecilius]|
|1965|JUN 8|STT136B|Strange Tales|[Doctor Strange][Clea][Dormammu] [Baron Mordo][Kaecilius]|
|1965|NOV 11|STT141B|Strange Tales|[Doctor Strange][Clea][Dormammu][Baron Mordo] [Kaecilius]|
|1965|DEC 9|STT142B|Strange Tales|[Doctor Strange] [Kaecilius]|
|1966|JAN 11|STT143B|Strange Tales|[Doctor Strange] [Kaecilius]|