The big drawback of the Master Ball is that there's typically only one in the entire game, leading to childhood stress for those early Pokemon fans who weren't sure when to use it.
Note which cards you already own from starter decks and opened packs
Metal-types, which are often burdened with high retreat, benefit from this mobility
Early Magic sets were obsessed with trying to design creatures around these weird, prohibitive drawbacks which almost never led to anything playable or fun
The new one is Iconic, which is the rarest of all the cards, featuring premium alternative art, glossy foil zones, and hot-stamped text, with only two cards being available in the set: Mickey Mouse Brave Little Prince, and Minnie Mouse Sweetheart Princess riding a carousel