A brief description of the manhwa Sword of the Undying:
Archimond, the strongest necromancer who once plunged the continent into terror, had lost his life to the sword of the hero Berkel Reinland.
And 200 years later, he was reborn as a baby of a certain sword clan and spoke his very first words:
“Guardians of darkness, my servants, my soldiers—heed my command!”
[By the The Artist of (Noblesse!)}