The Bone Shaper's Revenge

Elara Lynn's father entered the palace for the imperial concubine, but was falsely accused and died. To avenge her father, Elara enters the palace as a maid, using her "To paint the bone" skill to get close to the imperial concubine. She uses her technique to make wrongdoers suffer. Her blood feud is avenged in deep palace power struggles, a story of revenge and growth.