当Mathayus由一个值得信任的朋友出卖，他必须封送他所有的力量，战胜一个狡猾强大的对手。他的对手会不择手段地解开一个至高无上的上古魔力。

　　Followed by the conclusion from before, many more affairs ensue within the land of Mewni and in the world of those influenced.

　　Season 3　　1. The Tales of the Seven Keys　　2. Heroes and Morons　　3. The Losses of Magic　　4. Be the Penny　　5. A Life in the Day　　6. Do You Like Teeth?