Going second OTK deck built around going second, and then either OTKing or breaking boards with Machina Citadel or Accesscode talker, while setting up Super Dora or Apollo. The idea is to use Machina Citadel as a powerful recursive boss monster by stacking the GY with them, and then kill in one shot with Liebe. You also have the insane power of using Urgent Schedule to summon Scrap Recycler and Machina Citadel, which going second is an excellent way to break boards with DRNM, particularly with the Knightmares in the extra deck. Crystron Rosenix and Machina Fortress are included as Scrap Recycler targets, and Golem as the Scrap Wyvern Brick (though placing it in attack position on your opponent's field will open up OTKs.) Irradiator and Megaform can help make trains and stack multiple Citadels, and are mostly here because Machina Redeployment is such a nuts card, and you need more targets. Still, the cards are good and help make trains where you'd have Citadels. Derricrane and Bullet Train are both Obligatory, because trains. Derricrane attached to Super Dora + Apollo is pretty good going first. both have useful side effects, and make rank 10s easily. You only need 1 Knight Express to search out with Switchyard (itself a busted card), at least in the Machina builds. Flying Pegasus Railroad Stampede is just here as a Switchyard target, but in a pinch it is a dope normal summon. Rather than run 3 Switchyard, we're running 1 Switchyard, and 2 Mine, with Set Rotation, and Terraforming. You don't need as many copies of Switchyard as Mine, and Mine is basically here to be spell negate bait, though it also opens up easy Train OTKs. Gadarla is run over Jizikiru, who has synergy with the deck, simply because some Dino players are using Simorgh to Barrier Statue lock people. I think Kaijus are really good in trains, and are good right now - Dragoon is outed with 1 Kaiju, and Kaijus help out all kinds of cards you can't destroy (which is one of the things this deck excels at going second. Dark Ruler No More is basically obligatory in a deck that is dedicated going second. Infernoble makes this card a lot worse, but Infernoble's board is relatively easy to break after hand loops, and we can bring in hand traps for that matchup. Lightning Storm is likewise a going second staple, should be pretty obvious what the card is for. Urgent Schedule has fringe benefits going first if you see it alongside Scrap Recycler, adding a Level 10 Machine to your hand when you pop it with Wyvern. Unchained Abomination destroys spells and traps in control matchups, and is good for breaking boards in some instances over Accesscode. I love the card. Genius is some good going second negation, which can help turn off protection, force out negations, and enable board breaking. Pentestage and Underclock Taker are here for enabling OTK's. You don't need Anger Knuckle now that link zones aren't a thing for XYZ monsters.