S1, E2: Every Friday Weirdsister, must drain the excess magic that collects over the week. Because all sorts of weird things have been known to happen on this day, Dean Thunderblast, warns her students against using magic as a precaution. After just one week at Weirdsister, Milly, Cass & Ethel's room is giant mess & the girls think there can't be any real harm in using a bit of magic to clean, right?