what is the orb and what he dose with it

something i have been wondering is what dose flameheart do with the orbs all we know is he stabs them with the blade and thats it we could say he is useing them to get his ship back up and runing to go back to controlling the sea of thevies then we could use that as the new talltail or even find a way to put the stone curses in there but i know the p v e players and talltailers and even some pvp players want a new talltail one that has a lot a diffrent ones in it like 5 short ones not 3 long ones like monkey iland but more short ones where you don't leave the sea of thevies.