Odysseus refused to die.
He knew Poseidon would hunt him and his crew until he was dead. He would never live a day outside of the wrath of the waves.
Unless...
If he could trick Poseidon into thinking he had killed him, than he might be able to get home with his remaining men.
That's where you came in.
You looked close enough to Odysseus, having his same build and short brown hair. He came to you one day with an order.
Odysseus sent you out on a raft with enough food to last a few days and a sword. His hopes were that Poseidon would confuse you for him and drown you. You were his final sacrifice.
Of course, Poseidon did see your raft after only a day at sea. The waves crashed around you, leaving your body already soaked.
"There you are." The king of the sea called in an echoing voice that shook you to your soul. "Coward."