Card Lores:Ocean's Descendant, Poseidon

The child form of the great ocean king, he had appeared due to the phenomenon known as 'Stride'. However, unlike the great ocean king everyone knew, he was a frustrated child with a bad temper. When he had appeared the damage done had been equivalent to the Great Dragon King. If not, possibly more. His power was so great that not even the great Interdimensional Dragons could stop this child with a horrifying strength. Eventually he calmed down and was returned to his own timeline by the Interdimensional Dragons. However, not even Chronojet Dragon could reverse all the damage done to that area.

Knowing the Stride phenomenon came from the past, it only strengthened the clan's belief that their great emperor survived the Link Joker way. However, the Empress ends up finding an old text that reveals the Emperor's power was sealed as a child to prevent a dangerous phenomenon like Stride from happening again.