At the start of the player's turn, they can move up to two damage counters from Madam Mim to a chosen opposing character , making it easy to deal with chip damage and turn it back on the enemy
All-in-all, this is a pretty cool card, and definitely worth adding to your collection
While some might see this as a bad thing, pointing out the redundancy in either playing a card or playing against it (Gardevoir SW/Gallade SW instantly comes to mind), that was hardly the case
Double-faced cards also provide Wizards of the Coast a way to add rules text to a card
a Pokmon card with the back of a Magic: The Gathering card
Pretty obviously if you don't have enough access to said colour you want to lay your land rather than cycle it and so for the most part these are just half the cost of the various other cycling lands and that makes them pretty all round great cards