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
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
C Common Roar of the Blue-Eyed Dragons X SPELL Special Summon in Defense Position, 1 "Blue-Eyes" monster from your Deck, GY, or banishment (but if you control no "Blue-Eyes White Dragon", you can only Special Summon "Blue-Eyes White Dragon" with this effect), also you cannot Special Summon from the Extra Deck for the rest of this turn, except Dragon monsters
Red-Eyes Slash Dragon can invoke this trope by equipping a Warrior monster from the graveyard to itself each time it attacks, turning said monster into a equip spell that grants Slash Dragon an extra 200 ATK