Is chapter 49 confusing for anyone else or am i slow

Well I guess it gives us a hint how the gluttony rakasha or whatever i was called is inside of Han Maru

I don't understand how they brought him back

he gained the power of the immortal dude and since his power allows him to regenerate from even a finger they were able to “regenerate” han marus entire body to where they were (idk if this makes sense but this is how i understand it)