Champions of Kamigawa booster pack

Champions of Kamigawa introduces several new mechanics to Magic as well as the first Legendary Enchantments and more Legends than in any set ever -- including Legends!
Bushido - Creatures that follow the Japanese "way of the warrior" become bigger when they fight other creatures in combat.
Flip Cards - How does a Legend become a Legend? In these cases, they're regular creatures who can achieve great things in the course of a Magic game, gaining new abilities and even new names and creature types.
Soulshift - The Spirit creatures of Kamigawa can return from the dead when their compatriots die.
Splice onto Arcane -This ability of some instants and sorceries allows them to piggyback onto other spells to get their effect without losing the card.
The best cards of this expansions are: Cranial Extraction, Kokusho, the Evening Star and Keiga, the Tide Star.