Fortune favors the bold

Somewhere in Bristol, Unplottable House Piper's Reed

At the age of 95, William Piper can safely say that he has seen both the best and worst of the world. He was born as a second son of a wealthy neutral pure blood family the early rise of dark lord Voldemort. He was considered very gifted in charms & runes. He completely stayed away during the conflict of light vs dark traveling the world gathering and increasing the knowledge. It was during this travel that he started learning alchemy. Apart from his magical knowledge, he was also obsessively interested in non-magical world's history and technology. He unlike other pure bloods saw that the muggle world was drastically improving in technology. As such, he spent half the time learning about their history and technology which helped him in making a cure for cruciatus exposed nerve damage and damages to brain.

While he was in Japan, he learned the art of magical forging. In china, he learned to use sword and in South America, he learned more about farming, herbology and even learned about the chemical compounds that is involved in potion making. The most important thing in his life was learning alchemy from druids while he was in Africa. He made significant profit for his family when he employed alchemy in making the potions more potent and a few farming lands of his family more fertile. He also made use of this and produced more food and gave half of them to various orphanages across United Kingdom.

Due to devoting all his time in various knowledgeable pursuits he never married but made up for it by spoiling his nephews. So at the age of 95, he died peacefully in his sleep. Now William knew he never did much to help during any wars but he thought at least he made some help after the war and brought more advancements to the magical world. So when he was feeling a very powerful presence in front him, he was oddly curious and also afraid. Curious because he did not know what these gods want with him and afraid because they were many, seemed very powerful and he could not see their faces clearly (Also being dead does not help him in this regard).

When one of them said, "William, you have been judged worthy. So we are giving a choice and an opportunity. Should you not accept, you can continue on with your next great journey, but should you accept, we can give you even greater Journey."

William blinked once then twice and finally asked, "Ok, May I ask what this opportunity is and not to mean any disrespect but may I know who you are all?"

Another one now spoke in a more jovial voice, "To answer your second question William, we are what you mortals call gods, specifically the Oldest of them all. You can say or even call us the 'Old gods' except the grumpy one next to me, you can call him stranger. We have names but you cannot speak them in your language."

Another in a rougher tone, "And what we want from you is to born in another world and help the chosen one fulfil his destiny to save the world."

One more spoke, "You will be saving this world from a very dark undead ice demons and their undead thralls. But even more so you will also help save them from your fellow mortals. You will help us spread our influence again over the land"

William sighed and knew the choice he would make because no matter his accomplishments, his decision to stay out of war still weighed heavily on his mind. He looked at these beings and said, "You should know what choice I would make! But can't you at least tell me more about these little detail?"

Again one of them spoke, "We know; but the free will for mortals is a rule that we greatly follow. And as for your other question, you can find out yourself when you go there!" William detected a little smug tone in the voice and sighed when bright light enveloped him and his world went blank

In Riverrun, 264 AC

Lord Hoster Tully was pacing back and forth before the birthing chamber of his wife and was praying to the seven that both his wife and child should be healthy. He already lost 3 sons who did not survive infancy. He was greatly hoping that this child whether son or daughter will live long enough and his wife will recover from the childbirth. When he suddenly heard a child cry, he immediately went inside and saw the midwife bring him a beautiful baby girl with her mother's auburn hair. He cradled her gently and went near his wife when she cried again. He was immediately moved away from the maester as the mid wives went to help deliver another child. He was waiting with both anxiousness of the child and fear for his wife when his wife Lady Minisa gave birth to a boy with brown hair and blue eyes.

He was filled great joy and pride when he saw the daughter but even more so on seeing a son to be the heir of Riverrun. He went near his wife who was very tired took both the babes and asked him, "What will be their names be my love?"

Hoster who was just looking loving at his wife blinked and replied with a smile, "Catelyn for the girl and William for the boy." Minisa smiled and went to sleep tiredly after mumming their names.

Maester informed Hoster, "Milord, Let Lady Tully sleep her exhaustion while we will send ravens regarding this great news to the others and arrange for a great feast. Hoster replied with a smile, Yes, Please do so; this is a great day indeed! The seven has fit to give me a heir once more and also a beautiful daughter."

None knew that the baby heir in question was listening to their words eyes closed and taking everything that is being said and done. The repercussions of the baby heir will be felt in the entirety of the Westeros in later years to come which none know about except the Gods themselves.