I Saved Your Kingdom, Honey / Beastmaster of Legends: My Queen, My Empire / Crown of Lies, Sword of Judgment / One Sword, One Betrayal, One Empire

For ages, a peerless immortal guarded the border and shielded the realm with his supreme power. Betrayed and banished by the foolish empress, he left without a word. The grand formation crumbled, demons swarmed in, and the empire fell into ruin. Now the exiled supreme returns with a blade. Who can survive his furious vengeance?