Elixir of Eternity and the Sovereign's Oath

The epic conclusion to a 300-year journey of obsessive devotion and unwavering love!Celia von Ulster, the former knight and beloved Empress, is running out of time. The temporary magical wards holding her fragile, failing body together are on the verge of shattering. To save the woman who is the very other half of his soul, Emperor Leonhardt must risk everything. Armed with the memories and wisdom of five agonizing lifetimes-as a monk, a merchant, a martial artist, and an alchemist-the absolute hegemon will defy the laws of nature and magic itself.Their desperate quest leads them into the heart of the Miasma-Tainted Lands, a realm of corrupted magical beasts and suffocating despair. At the summit awaits the terrifying Divine Beast, the guardian of the World Tree, where the ultimate spear and shield must fight in perfect harmony. But even if they secure the legendary Leaves of the World Tree, the true trial begins in an ancient, frozen workshop at the bottom of the abyss.As Celia's life hangs by a thread and the horrific heat of thermal runaway threatens to consume her, Leonhardt must wager his own lifespan to synthesize the supreme Elixir of Eternity. Will three centuries of maddening solitude, desperate prayers, and absolute devotion finally rewrite their tragic fate?In the breathless finale of The Obsidian Crown and the Platinum Blade series, discover a tale of:• A fiercely strong female lead who refuses to be a mere damsel in distress.• An obsessively devoted, overprotective emperor who will burn the world to save his wife.• High-stakes magical battles, alchemy, and a 300-year reincarnation mystery.• A deeply satisfying, guaranteed happily-ever-after featuring a grand royal wedding and a beautiful new family.Step into a world where love conquers death. Experience the breathtaking final volume today!