A Fallen Knight-Lost art of necromancy

Severus, a handsome lad with a shy nature. He lived a life that could be called 'non-exisistent, his interaction with the opposite sex was more or less 'non-existent' as well, except for the crown prince's fiancée, Melanie. That too because both of them were childhood friends. But this didn't last long, because Severus— was killed. Previous life ----- Severus was the ex-general and Shadow Knight of the Rivera kingdom. He was a loyal and charming knight who performed his duties very well. Despite his looks, he lived in the shadow of Crown Prince; Maverick, but destiny turned its wheel and the Crown prince's fiancée fell in love with Severus. Betrayal, heartbreak, and jealousy surged inside him and Maverick planned an assassination for his best friend Severus. Severus died in pain. He felt betrayed and cheated by his own sworn brother but he accepted his fate and closed his eyes to accept death. The next moment he heard something earth-shattering. Nobody knows what Maverick told Severus but whatever it was, it questioned Severus's existence. “No, this can’t be true—” “Who am I?” “What am I?” “Who are my parents?” “What was the reason behind my existence?” Severus died while these questions remained unanswered. ——Present life—— Severus found himself resurrected, to his surprise, in his original body and within the same timeline. "It's only been a few days since I was assassinated, and I've been resurrected," he muttered to himself. As he contemplated his situation, he discovered newfound powers within him. He raised an eyebrow in amazement and questioned, "What are these powers?" Looking around, he noticed a bird perched nearby and couldn't help but wonder, "A bird? Why is there a bird here?" He observed the black raven and inquired, “This black Raven is known as Noworry, huh?” With this unexpected second chance at life, Severus was determined to unravel the unsolved mysteries from his previous existence. He made a solemn vow to exact his revenge. *********************** A new character is introduced in his new life; Noworry, a funny bird who becomes his pet, sent by Hades to help him. In this life, he will have no shortage of women who wish to accompany him. Starting from ghosts and mortals to gods, Severus will entertain visits from every existence. However, Severus didn’t ask for women. He was a man who believed that love can happen only once. Since his first love was unsuccessful, the word 'love' disappeared from his life. Will there be any girl who would bring love back into his life? Or will he remain as a monk for his entire life? Witness Severus's growth and troubles, on his way to unfold the various mysteries of the world and becoming a great necromancer. --- [I don’t hold any copyrights of the image above, it’s just a random image I chose. If you own this picture and want it to be taken down, just dm me. I will do it.]