[s4e1] The Three Impossibilities -

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

Disguised as "Ursula Catnip" (played by Lydia Page, replacing Bella Ramsey), she struggles with her new identity while trying to fix her mistake. [S4E1] The Three Impossibilities

Continues to be strict with Mildred, fearing her "chaotic magical abilities" will lead to disaster. This final challenge is originally unreadable and ruined