While many around the world simply collect the cards for the sake of completing a set, in Japan more people collect them to compete and play
UR Ultra Rare Gladiator Beast Darius X EARTH Level 4 [ Beast-WarriorEffect ] ATK 1700 DEF 300 When this card is Special Summoned by the effect of a "Gladiator Beast" monster: You can target 1 "Gladiator Beast" monster in your Graveyard
Eater of Days only belongs in decks that want you to give away your own cards, but you have to do it in a way to trigger the enters ability to make your opponent skip two turns
I doubt youll be transforming Kefka, Court MageKefka, Court Mage into Kefka, Ruler of Ruin all that often, but if you can take a turn off to do it, youll get the form of a card-draw engine the likes of which we dont really see in our format
A large number of serialized Multiverse Legends held onto their value as well, featuring dozens of cards priced at over $100