Even single cards from the anniversary set sell for high prices, while the entire half deck is extremely valuable and elusive
9: You get an emblem with "Whenever a player casts a spell, you create a 2/1 blue Ninja creature token." Legendary Planeswalker - Kaito Ninja Teen (Gain the next level as a sorcery to add its ability.) Whenever a creature you control leaves the battlefield, each opponent loses 1 life
Or maybe you have some friends at the table that are willing to share their best threats, who knows
Whether you purchase cards from the latest Scarlet & Violet expansion or own vintage Base Set cards from years ago, the height and width remain the same
While it might not be a ton of damage, losing three or four life every turn or so can quickly add up
Were you allowed to refuse the regrade and get the old cert slab back as is