In a recent addition to the post, the OP explained that he and his brother are very close and it is likely that those cards that he sold are a combination of both his and his brothers
This means that you can't use one Crystal Slipper to allow two new creatures to attack in the same combat
#1: 2006 Pokmon EX Dragon Frontiers Holo Mew Gold Star #101 PSA 10 Topping the list in this weeks TCG sales is the PSA 10 Mew Gold Star sold for $192,000 on Fanatics Weekly auction
These decks would weather the storm, stack their hands with Trainer cards, and then boomUnown HAND steals the win
Pay 500 Life Points during each of your Standby Phases or destroy this card
The story goes that some Raichu cards were accidentally mixed in with Clefable at the printing factory and were supposed to be destroyed, but some Wizards of the Coast employees pocketed a few of them (one account says 11 copies were saved from the factory, though the exact number isn't known)