This Commander is so underrated, a strong contender for the best in Izzet imo, good choice
According to the shop owner: Im a graphic designer whos been drawing Pokmon since I was a kid, and I started making field guide binders as a way to combine my love of collecting with real world ecology, paleontology, and discovery
130 (Translation) Hatakeyama & Kubo (2000), p
When your opponent activates a card or effect (Quick Effect): You can return 1 Xyz Monster you own attached to this card to your Extra Deck, then you can Special Summon that monster from your Extra Deck, by using this card you control as material

Advanced Search Sets Random Syntax Angrath's Rampage Anzrag's Rampage Battle Rampart Case of the Trampled Garden Cramped Bunker Cramped Vents // Access Maze Cramped Vents // Access Maze Crash the Ramparts Crude Rampart Dazzling Ramparts Dire-Strain Rampage Fortified Rampart Ghor-Clan Rampager Greenbelt Rampager Hog-Monkey Rampage Invigorated Rampage Knight Rampager Pramikon, Sky Rampart Predatory Rampage Rampage of the Clans Rampage of the Valkyries Rampaging Aetherhood Rampaging Baloths Rampaging Brontodon Rampaging Ceratops Rampaging Classmate Rampaging Cyclops Rampaging Ferocidon Rampaging Geoderm Rampaging Growth Rampaging Hippo Rampaging Monument Rampaging Raptor Rampaging Rendhorn Rampaging Soulrager Rampaging Spiketail Rampaging War Mammoth Rampaging Werewolf Rampaging Yao Guai Rampant Elephant Rampant Frogantua Rampant Growth Rampant Rejuvenator Rampart Architect Rampart Crawler Rampart Smasher Rhino's Rampage Rhino, Terrible Trampler Ruinous Rampage Rust-Shield Rampager Rustler Rampage Slash, Reptile Rampager Taunt from the Rampart

The reason why theyre so valuable though, is because theyre all artifacts, you can play a land and one of these Mox on your first turn, giving you access to at least two mana for free on your first turn