Zeus and Poseidon were in the middle of a battle for the throne. Poseidon shot water at Zeus and missed. Then, Zeus threw a lightning bolt and it hit his trident which electricuted him because it was metal.
Zeus flew down from the sky into the ocean on a cloud and his lightning made a whirlpool in the ocean then, he struck Poseidon again with a lightning bolt and Poseidon let go of his trident.
He sank to the bottom, and he could not swim up to the top. He used all of his energy from trying to get up, but he couldn't. By the time he lost all of his energy, he fainted.
Then, Zeus grabbed Poseidon out of the water on to this small island where no other god could see. With the trident, he stabbed Poseidon in the chest and he died, and with his last breath he said,¨I love you brother.¨
In the end, Zeus won the throne, but he felt terrible killing his brother. He realizes how much more fun they could have had. That's when Zeus came up with this permanent idea.
Ever since he killed his brother, he felt bad. So one day, he made a whirlpool of his own, and he jumped into it. He commited suicide, because he wanted to be with his brother once more.