DM2 / DM3 / DM4 / DM5 / DM6 / DM7 / DM8
A whale with a massive cannon mounted in a turret on its back. It hides in the sea and sinks foes with the gun.
うみにひそみ きょうりょくなせなかの ほうだいで つぎつぎとてきをげきちん
"Fortress Whale" can be temporarily obtained by Ritual Summon using #700: "Fortress Whale's O" with the following sacrifices: