The sets legendary creatures include characters that have never appeared on cards before, and many of its spells contain allusions to Magic s past
Kardur, Doomscourge - Goad is a fun and powerful mechanic, and while its not specifically called that on the card, thats what this guy does to all your opponents creatures on ETB
Monsters such as Lilith, Lady of Lament can search these normal traps from your deck to your hand, and the field spell Lair of Darkness allows you tribute your opponents monsters for your traps
Mox Amber is valuable with the right legendary creatures, offering fast mana production without the need for sacrifice
Millennium Duels has taken this format and modified it for the better, no longer randomly placing opponents and giving the player far more opponents to choose from, spanning across four separate generations of Yu-Gi-Oh characters
Just as they would not be the same without the inclusion of any given set