Note: Historically, Kairyu-Shin has had a strangely localized name. Its Japanese name is written as 海竜神 (Kairyu Shin, Sea-Serpent deity), but force read as “Leviathan”, and yet its name was localized as Kairyu-Shin, with the usual reading and not the forced reading. This new card is written again as 海竜神 (Kairyu Shin), but it’s instead meant to be read as “Kairyu Shin”, while adding a title of “Leviathan” so that it features both names at the same time.

Note 2: The (1) effect is supposed to work similarly to Rivalry of Warlords or Gozen Match. The text should match those cards but since it’s more specific as to what gets forcefully sent to the GY, I left a more literal translation.

Source.