It's highly recommended to place Magnemite onto the Active Spot for the first turn, and wait until you have some Energy attached until your bring Miraidon ex into play
A 1st edition, holo, shadowless Mewtwo could get you around a grand at a grade 9, and a grade 10 is currently on eBay for $3,000
Cards in the Wilds of Eldraine main set create six different Role tokens: Cursed, Monster, Royal, Sorcerer, Wicked, and Young Hero
This first set of 4 cards are nuts, specifically Trazyn and Biotransference
A lot of the on-theme finishers (Meloku, Multani, Avenger of Zendikar, Rampaging Baloths, Primeval Titan) are at a high power level, which is great for convincing the power-max crowd to try it but awkward if you're trying to tone things down