Betrayed by My Knights, Saved by the Slave I Once Freed

Once a legendary dragon commander, Rion returns after ten years in prison to find himself betrayed and enslaved, with his daughter in grave danger. His enemies think he has nothing left. They forgot the slave boy he once saved—now the secret Master of the Dragon Tower. Backed by an ancient dragon and its formidable master, Rion turns his disgrace into their nightmare. They demanded he kneel. Soon, even their dragons will bow.