Being able to do this already makes it a great card
Interestingly, a former WotC employee chimed in about this card
When x happens, draw a card seems to make up a large portion of many recent staples, and more and more legendary creatures with a built in card draw engine get printed and played, so having your opponents discard down to 6 instead of 7 can be a great way to slow down their game plan
Even if youre not looking to maintain the value of your cards per se, I doubt youre eager to have a bunch of warped, curled, or bent cards
Weve repeatedly mentioned that targets will not be lacking
Even reaching four attached Energy immediately pushes the attack to 140 damage , and once Mega Metagross reaches six or seven Energy, very few Pokmon in Pokmon TCG Pocket can survive a hit