The Once and Future Heretic — Celine Claire

Britain, 530 AD. The land is dying—not from Saxon blades, but from a cursed Grail that bleeds the earth dry.Lancelot du Lac, the kingdom's most infamous ex-knight, is pulled from drunken oblivion by a heretical nun who claims:The Grail is not holy—it's a prison for something older than Christ.Arthur's reign is a lie woven by Merlin to hide the truth.And the only person who can break the cycle is the traitor who shattered Camelot.Now, Lancelot must reforge his broken oath, ally with his worst enemies, and wield the one weapon that can unmake the Grail:Excalibur's forgotten twin—Caliburn, the Sword of Betrayal.(Arthurian elements: Grail lore, knightly oaths, Celtic vs. Christian tensions, but with zero romanticism.)