Before Roger was executed, he introduced to the planet this excellent treasure can be claimed by anyone who could arrive at it, thereby commencing the Great Age of Pirates.
Theres some debate concerning the best time to slip Z in the timeline. Its viewers decision: cue it up right after episode 573 or wait right up until the tip from the Zs Ambition arc with episode 578. Whichever you casino select, not seeing It might be a blunder.