Madam Mim - Rival Of Merlin (48)

Shift 3 (You may pay 3 {I} to play this on top of one of your characters named Madam Mim.)
GRUESOME AND GRIM {E} — Play a character with cost 4 or less for free. They gain Rush. At the end of the turn, banish them. (They can challenge the turn they're played.)