Death was smiling at his master, sharp teeth on full display "Wh-what do you mean?" A faint blush rose to Harry's cheeks; he couldn't remember the last time he had stuttered. But he didn't think anyone could blame him. Death's smile would probably haunt his nightmares for eternity.
"Well master, you have four options. You…" death was interrupted by his master coughing and spluttering.
"Wait, you mean the master of death thing is real?" Death despite having no visible eyes managed to convey a look of utter exasperation. One that read "are you shitting me" and Harry drew in on himself slightly.
"Yes it is." Death said it so deadpan it made Harry wince. "As I was saying. You have four options. Option one; you may be reincarnated. With this option we will take your soul with your memories intact and put it in a newborn. You could be reborn in the past or future. You do not get to choose when and where." Death looked to Harry to see if he had questions.
"Wouldn't that create a paradox or something?"
"No master. There are hundreds of trillions of timelines moving alongside each other; you shall be placed in one of those." Harry just nodded and motioned for death to continue.
"Option two; your soul can be put back in your body. You will wake up back on the battlefield in front of Ronald and hermione." A Cheshire grin spread across Harry's face just imagining the looks those two would have. Option three; you can stay here in my realms with me until you feel like doing something else." Harry looked like he was thinking so death left him be.
"Option two sounds very fun. Seeing their faces would be amazing." The smile Harry wore was vicious, and death matched it with his own before sobering.
"However I remind you master there is still the marriage contract and there is no way out of it. It was signed by all magical guardians." Harry's face fell back into the stony mask he had before and gestured for death to continue. "Now option four; you can have your soul memories and magical core put back into your younger self." Death saw their masters eyes light up "I will admit my sibling Time did not like this option and refused to help so we have limited options, and when i say limited i mean one. there is only one point that you were close enough to death for me to put you back without Times help." Harry looked at Death incredulously.
"I almost die every year and that's not enough for you?" Death shook their head. At Harry's raised eyebrow death elaborated.
"Yes you were put in a lot of life and death situations but for this you needed to be actively dying. With that requirement it left only one option. Well two but the second is just basically option two so that leaves the time you were poisoned by the basilisk at the end of your second year." harry looked thoughtful for a minute before speaking
"When you say you will put my magical core back. Do you mean I will have an adult core? So when I reach seventeen nothing will happen." he looked to death to answer.
"No. it means your level of magic will remain as it currently is. The magic you have will be put in your adolescent core So it would be as if you were born with more magic than you were this time. When you reach seventeen your core will mature again and your magic levels will once again increase." Harry was gaping at death. However he soon went back to asking his questions.
"What happens if I die again?"
"Every time you die you get the same four options. If you choose reincarnation and die the second and fourth options will relate to the life you just lived. And of course the fourth option might not be an option at all depending on whether you were close enough to death in your last life for that option."
"And if i stay in your realms can i see my family?" Death looked at him in pity.
"I'm afraid not. You are truly immortal and can not pass in the same way as other mortals. You may be in my realms with me if you just want a break or I can teach you how to control and manipulate the realms. however just as i cannot interact with the ones that have passed nor can you." Harry sat (still cross legged on the floor) for a good while thinking. He let out a long measured breath before shuffling around and sliding back to sit at death's feet with his back pressed against death's legs. Death slowly put his hand in Harry's hair and played with the soft raven locks. The two stayed like that in silence for what seemed like an eternity. Harry sighed, breaking the silence.
"You know what I'm going to choose." it wasn't a question but still death answered.
"Yes."
"Any advice?"
"Get to the goblins. You can trust them." and with those parting words the world fell to black.
