You have to add the required number of "Required Cards" and "Selectable Cards" as specified below. You are not required to set one of the "Skills Allowed."

Skills Allowed

• Out of Control!
• Unstoppable Train!
• Sunrise Express!
• Overnight Express!
• Super Express!
• Train Connection
• Engine Power Over-Limit!
• Train Uncoupling!

Required Card (1 card)

•  

  Superdreadnought Rail Cannon Gustav Max

  Xyz/Effect

Selectable Cards (8 cards)

•  

  Heavy Freight Train Derricrane

  Effect

•  

  Rocket Arrow Express

  Special Summon/Effect

•  

  Ruffian Railcar

  Effect

•  

  Super Express Bullet Train

  Effect

•  

  Revolving Switchyard

  Spell

•  

  Special Schedule

  Spell

•  

  Barrage Blast

  Trap

•  

  Flying Pegasus Railroad Stampede

  Effect

•  

  Night Express Knight

  Effect