MIxing Infinitrack and Trains.
In Master Duel I got Royal Foil Infinitrack Earth Slicer so I decided I should make a deck out of it. The main problem is it dies to hand traps. Called by the Grave will help but you can experiment with Crossout Designator. Then you should also put Infinite Impermanence and maybe even Effect Veiler even though it's outdated just so you can deny your opponent activating these cards.
Therion "King" Regulus:
Your main negation tool, searchable by River Stormer. It actually matters what you equip it with, as some monsters trigger effect when they are sent to the GY. Viable targets are:
1. Super Express Bullet Train(when its sent to GY you can add a monster from GY to hand and yes its Therion "King" Regulus so you can reuse him again next turn. Rinse and repeat.
2. Infinitrack Goliath - when you negate an effect you can attach the Goliath to an Xyz of yours and make it indestructible. Nice!
3. The Other Therion "King" Regulus - if you do this you can detach the equipped Regulus instead of sending the one on fiend to the GY. He will also get 700 ATK boost and again stay after negating so you could use him as a beater.
4. Ruffian Railcar - it will let you search a Level 10 after you negate an effect with Regulus. Mediocre.
Deck Starters:
1. The most usual way to start is with Infinitrack Harvester, link it to Infinitrack Goliath so that you have it for later and spawn Brutal Dozer which will search another Infinitrack(in 90% of cases that's Road Roller to create Soft Lock). Then Xyz them into Rank 5. Detach from Infinitrack River Stormer to get Therion Regulus and equip it with the card you just detached. Summon Therion Regulus and now you have Soft Lock and an omni-negate ready to blow!
Note:If you have Road Roller in hand you can spawn it when you drop Brutal Dozer you can spawn another Infinitrack, I recommend Infinitrack Crab Crane to get Outrigger Extension to protect your Xyzes.
2. Heavy Forward. You can get Harvester with it and do 1. or do something else depending on your hand.
3. Urgent Schedule. It's great going second. It will give you some bodies(effects negated) to turbo Xyz plays combining them with your hand. You can do Infinitrack Xyz and Train Xyz easily!
4. Revolving Switchyard. You can very easily go into Rank 10 Xyzes. You summon Super Express Bullet Train from your hand then with terrain effect Heavy Freight Train Derricane. If you have a missing Lvl 10 you can discard a card and get one thanks to terrain effect again. You make Rank 10 Xyz depending on situation. Varudras is really good too you can sit on his negate on opponents turn and deny their plays so they don't snowball you. If you combine it with 1. you have 2 negates on enemy turn!
Mid Game:
Flying Pegasus Railroad Stampede is a golden card here. It revives a monster, almost always a Level 10 from GY and you can make an Xyz.
Late Game:
You would want Super Dora on board to protect Megaclops from destruction.
Edit:
I played with myself versus a Monarch meta deck I found on this site and noticed my deck lacks going 2nd potential and board breakers. So i added some like Lightning Storm and Raigeki and the Floodgates by Attribute and Type to side.