Cage to Crown

Reaper, the Assassin King, is betrayed by her deputy Asura and dies from Black Oath poison. Her soul transfers into Margaret, an abused girl sold to an underground coliseum. Using her powers, she survives, allies with wheelchair-bound heir Andrew, and takes revenge on the Tucker family. She uncovers Asura and Poppy's conspiracy, then storms their wedding to reclaim the Temple of Death and cure Andrew.