Matris Ater Clementia, or Mother Mercy, is the creator of the Black Mercy plants used by Mongul, and the new Lantern for sector 2261. She initially created them to find people who are suffering and dying to ease their pain, which created a symbiotic relationship with her. However, the first Mongul discovered the plants and used them to spread his evil, even mutating some of the Black Mercys into giving their victims suffering.