Hp x snk

They finally reach the basement of the Yeager family but what they find is not what everyone expected.

Being the master of death wasn't all it was cracked up to be. At least not in Harry Potters opinion, not that fate and destiny ever cared about him. So after all his family had gone and muggles nearly wiped out due to plagues, floods and other disasters. It wasn't long before the magic of wizards became twisted and wrong, Harry watched untouched as the magic changed them. Some became muggles, some stayed the same. But most.... Most became Titans. And so Harry fought and helped build the three walls that would protect all mankind from the monsters until he was betrayed. Locked in a basement where he was experimented on, where many normal people would have died he survived until the day when he felt the titans break through. Felt the building above him collapse. Where he heard the cries and wept, locked underground unable to do a thing until finally the door opened and he was free to beat back the plague on humanity once more.

Titans live for a long time, possibly upto 200 years. They have the same life span as wizards and witches. Although they have no reproductive organs if they feed on enough humans what they vomit back up will merge into a new Titan if left for a period of 9 weeks or more depending on the extent of the titans feeding. As Harry is the last living wizard his blood holds they key to unlocking the secrets of the titans. When erens father gave him blood it was Harry's and that is why he has the ability to Titan shift. The other Titan shifters are descendants of the witches and wizards who became muggles and after many years the power is being awakened once more but in a twisted and changed way.