While it's most commonly seen in Pioneer within Izzet Phoenix decks, it has seen a reasonable amount of play in nearly every format where its been legal
Mewtwo can move objects, people, and entire structures with its mind
For just three mana (2 generic, 1 Red), it gives you the choice of generating a burst of red mana equal to the number of cards in an opponents hand or exiling the top three cards of your library to cast for free that turn
Excellent (EX) Cards in Excellent condition typically show some white spots on the edges and corners, a sign that they may have been handled without sleeves occasionally
Feel free to look and see if you can figure out which cards those are
But Wretched Bonemass is such a wordy, complicated cards that it's more headache than payoff