Gongjakgaui Yeokdaegeup Sindong

Once the commander-in-chief of Earth’s resistance and a legendary monster hunter, Han-Seong was dragged into another world and enslaved by the Empire through a binding spell. For ten long years, he fought their wars, crushed their enemies, and was discarded like a weapon. But death wasn’t his end. Revived by the Stone of Reincarnation, he awakens as Dale, the heir to a powerful ducal house. With unmatched brilliance and a burning desire for revenge, Han-Seong begins his second life to destroy the Empire that once enslaved him.

(Source: WEBTOON)