You can't learn all the skills in one lifetime… but what if you have multiple?  Sebastian Walker was a being who kept coming back to life after dying. Existing since before human civilizations, he encountered ability users for the first time in this lifetime as he set foot into modern society. Sebastian, delighted to learn that humans could now wield abilities and driven by curiosity about the potential of this new era, soon realized that life on Earth now offered more than just humanity's existence. A realization which hit him hard. Upon stumbling across a pocket dimension, then being rescued by the Human Federation’s Division Of Solitude, Sebastian was made to sign a confidentiality agreement and learned about an astonishing revelation. A fact that shook the Human Federation to the core and had instilled deep fear… A fact that even invoked mixed reactions from a being as old as Sebastian… “Monsters… keep… coming back to life?” ***** Sebastian gazed at the wound on the back of his hand with indifference as he looked at the man taking his last breath. It hurt but it was worth it. The man took labored breath, his hand entirely scorched, short hair standing on end as if electrocuted, numerous wounds covering his body — some black or blue while some open and bleeding — it was a horrifying sight.  With blurry vision he looked at Sebastian approaching him, despite fear overwhelming him, he still uttered with blood flowing through his mouth, tasting all metallic, “You beast, humanity depended on you. To think you are the one who hunted those ability users!” With insanity swirling in his eyes and a crazed smile on his face, he replied while spinning his bloodied dagger, “What does humanity’s fate have to do with me?” He bent and harvested a few drops of blood from the dying man, giving him a final farewell. “I’ll put your ability to good use.”