The original Mirror Force would let you destroy all attack position monsters your opponent controls, while Storming Mirror Force takes that up a notch (or 5) allowing you to return them to the hand
If there are eight or more permanent cards in your graveyard by the time you draw cards, those draws will cause the descend 8 ability to trigger
Of the four revealed, I would peg Meowth ex as the most valuable given its universality in the Pokmon TCG competitive scene right now, with Mega Starmie ex a close second
This reduces risk and increases transparency for investors
However, he later received a new card which is more useful
This Commander deck set includes: 99-card deck, 1 foil Commander card, 10 double-sided tokens, life wheel, and deck box