The set introduces the "Guardian" monsters and a contains support for Equip Spell Cards to back them up. It contains numerous cards from the Virtual World arc and a few from Battle City. It also reprints "Black Luster Soldier" as an Ultimate Rare.
Each pack contains 5 cards and each box contains 30 packs.
The set contains 54 cards, or 60 in the Master Set. This is comprised of: