Thunder Cats 
The Doom Gaze (1986)
Rankin-Bass Productions 

    Well, now the time has come for those unbelievers to get what's coming to them. Yes!  The Great Old Ones invaded more than one 80's cartoon show.  Here's the story of this episode:  Mumm-Ra (the old mummy guy) wishes to obtain the secrets of an ancient power known as the Doom-Gaze. Ta-She, an evil priestess, is the only one who possesses the knowledge of the Doom-Gaze. Ta-She, however, is imprisoned in a time-warp continuum.  And who does Mumm-Ra  call upon for the power to free her??  Duh, the Great Old Ones.  Mumm-Ra frees her, and she is able to put Lion-O under the Doom-Gaze spell in her preparation to trap him in the time-warp. Cheetara, however, is not affected by her spell, and the rest of the Thundercats are able to defeat her and return her to her eternal prison. 
    
mumraspell.wavThis clip is what most people think is gibberish, but listen...did I hearYog-Sothoth...and was that a Cthulhu?!?