Blue Rush - Rank 10 to God
This deck aims to establish lands close to your opponent's orb and wells, then aggressively pressure their life total. Depending on your hand, you typically build lands straight down the middle, but if your hand is a bit slower, it's fine to go down the side.
Mulligan aggressively for Prophet of Tides, Water Elemental or Oversky Towship, If you have one of those, keep Triton Warrior or Mystic Beast. If you have both of those, keep Frogify or The Emperor's Command.