I married the wolf lord for revenge

Elara Volpyr, a rare black fox princess from the sun-blessed Aurelian fox kingdom, marries into the brutal Frostfang orc realm of Valgard to avenge her elder sister Seraphina, who was tortured to death in a shattered peace marriage. Concealing her burning hatred, she outwits Grand Duke Kael and the ruthless Skarn sisters, surviving brutal life-or-death trials and turning the north’s own savage rules into her weapon of vengeance.