The episode begins with Mildred Hubble and her friends returning to Cackle's Academy. After a botched potions experiment, Mildred's appearance is permanently transformed into a girl named . To reverse the spell before sunset, she must find and complete three legendary "impossible" challenges. The Three Challenges
This final challenge is originally unreadable and ruined on the stone wall, forcing Mildred to use her ingenuity to figure it out before time runs out. Key Characters & Plot Points [S4E1] The Three Impossibilities
A second riddle or grid that the girls must solve quickly. The episode begins with Mildred Hubble and her
If Mildred fails to complete the challenges by dusk, the transformation spell becomes permanent, and her old self will be gone forever. The Three Challenges This final challenge is originally
Continues to be strict with Mildred, fearing her "chaotic magical abilities" will lead to disaster.