FATE: THE NEW POSEIDON Volume 1

"Hey there, God of the sea", said Kojiro as he came closer to Poseidon," Thankyou", he finished his words and cut Poseidon's right arm, then proceeding to evade his other attack he skillfully cut his other arm.
Poseidon somehow took a part of his trident in his mouth and tried to attack but only to be cut down in four pieces.
"You-You- Fucking Piece of Shit", he said as his body separated and he died.
"Phew", said the Kojiro, with a tired smile he continued, "I guess winning for once feels pretty good, Huh?".
Everyone stunned looked at the winner who had killed the God of the Gods," The... of Ragnarok is... The winner of the third bout... Humanity's Sasaki Kajiro!!!", people started cheering while God's looked at this scene with apparent anger.
"Is this how I die? To a worm? Pathetic", cursed Poseidon at himself as his soul slowly faded.
[Ding!]
"What the...", he said.
...
The soul of Poseidon and mortal fuses, now armed with his meta knowledge and Godly strength with infinite growth potential from the system what will he achieve?
This has multiverse traveling and I know some of you don't like such lore, but I would request to give you a try if you are interested in ROR and Fate fanfics.