AU: What if Severus Snape disappeared before his sixth year? What if Lily feels guilty after finding out? Severus will return few years later but with no idea who he was and is under a new name. He has skills that will surprise the entire Wizarding World and change the war. If you don't like the pairing, don't read. References of Ninja Gaiden and the movie Ninja Assassin.

This is the revamped version of 'Shadow Lion' where Severus kept his memory and trained to fight in the Wizard War in own his way. In the brink of despair, Severus was found by a clan of warriors with powers he never imagined. Trained under their guidance, he sought to use his new found abilities to shake the foundations of the Wizarding World. Disclaimer: I don't own Harry Potter