These are the two mythical zoans I was thinking of, honestly, I preferred Poseidon more since it was already established in the One Piece world that there is Poseidon so maybe, this Devil Fruit comes from those beliefs, kinda like Nika, but Ruamoku does have a wider range of abilities, and almost the same, the difference being that in seasons, where Ruamoku could create winter, or Rainy seasons, if you have something that you wanted to add, I'll read it and consider if it's good.
1. Hito Hito no mi, Model: Poseidon, Powers: Control over sea creatures (like Shirahoshi), create earthquakes (like Gura Gura no Mi), summon tidal waves, wield a trident with divine hydrokinesis.
2. Hito Hito no mi, Model: Ruamoku Power: god of earthquakes, volcanoes, and seasons, similar to Whitebeard, Akainu, Enel, and Aokiji, but cannot be elementalized like logia users.