This deck's key play is go first and try and set up a "defend the castle" type style of play making use of battle ocean, there can only be one, and marbled rock. Your goal is to use the marincess go first engine to make a super powerful marbled rock, made nigh invulnerable thanks to the field spell, and beat over any threat you come across until you win. Use There Can Only Be One to lock your opponent's play and keep their monster count very low so you can stomp over them. Using battle ocean and misstar boy your Marbled Rock should reach 5,000Attack which is enough to run over anything. Make use of field barrier to prevent your field spell from losing to MST or Twin Twisters though do keep in mind you are vulnerable if they use cosmic cyclone. If your opponent manages to make a threatening monster that can attack over Marbled Rock (Avramax, or Borrelsword) then use Marbled Rock's effect to pitch a Marincess and negate the attack until you get Paleo Dino, then use it to banish the threat.