Gol D. Roger's public execution was a perfect fake death.
He saw a truth in Ravdru that was enough to overturn the world, so heavy that he had to "die" to temporarily seal it away.
But in exchange for his fake death, he only had half a year left to live.
On the isolated island in seclusion, Roger cut out every reward for Straw Hat Luffy's soaring and silently played a chess game - to find the exiled archaeologist and point to the coordinates of ancient history...
When Luffy declared war on the World Government to save his friends, Roger in the shadow knew that the time had come.
"Come on, boy. Before the last flame of my life goes out, let me tell you what the so-called 'ONE PIECE' is."