Crossword clues for Mysterious power. 5 letters:MAGICMysterious power.SPOOFAustin Powers: International Man of Mystery, e.g.ESPMysterious powerVANESSAAustin married her in "Austin Powers: International Man of Mystery"MIKEMYERSPortrayer of Austin Powers, "international man of mystery"998001___ and its Mysterious Recurring Decimals (Numberphile video about the largest perfect power that fits in the space for this answer)