Trash Bride? The God-Tier Sorceress!

Mocked as a powerless mudblood, an outcast heiress is forced to marry a rumored monster. He recognizes his childhood savior, taking the blame for slaughtering her abusive family. Yet she hides a deadly secret: she wields a lost god-tier magic. As they finally wed, a massive army marches to destroy her bloodline. Can they survive?