Infinitrack

Infinitrack Fortress Megaclops is the card the deck is built to put on the field. Requiring three Xyz Monsters as Link Material, it is unaffected by non-Xyz monster effects, cannot be destroyed in battle except by Xyz Monsters, and can recycle Xyz Monsters from the graveyard each turn while stripping cards from the opponent. Reaching it demands a chain of Xyz Summons, and the main engine pieces exist precisely to stack the board with overlaid monsters as efficiently as possible. Infinitrack River Stormer, Mountain Smasher, and Earth Slicer cover Ranks 5, 7, and 9 respectively, and each carries a graveyard revival effect that triggers by tributing a Machine Link Monster — meaning Fortress Megaclops itself can feed their resurrection after it has already been used for Link Material elsewhere.

Getting to that point relies on the Level-manipulation tools the lower-level monsters provide. Infinitrack Harvester searches any Infinitrack on summon, while Infinitrack Anchor Drill drops an EARTH Machine from hand and can merge Levels with another Machine to hit the odd numbers needed for higher-Rank Xyz Summons. The Level 5 suite — Brutal Dozer, Crab Crane, Drag Shovel, and Trencher — self-special-summon by tributing an EARTH Machine, keeping the chain of bodies flowing. Outrigger Extension accelerates the climb further by promoting an existing Infinitrack Xyz two Ranks upward on the spot, and Spin Turn gives the finished board interaction by destroying opponent cards whenever one of the EARTH Machine Xyz Monsters switches battle positions. The deck plays best going first, as establishing Fortress Megaclops backed by Outrigger Extension's targeting protection presents an endboard that is genuinely difficult to dismantle through conventional monster effects.