Archfiend

Archfiends (悪党 - Akutō) are creatures introduced in Puella Magi Madoka Magica: Rebirth as a new species of antagonist to the puella magi. Archfiends are characterized by a genetically twisted appearance, often a confusing cacophony of flesh, metal and corruption masquerading as a graceful, or demented, beast. Archfiends, though capable of eating anything, are attracted to magic like moths to an open flame, craving it with an insatiable appetite. This often brings them into conflict with Puella Magi and more commonly, Witches, as they are their favorite source of food. All devoured magic is stolen from the Archfiend's meal for it's own personal use, the unstable, despair-laden energy only further warping and mutating it's Archfiend host like frenzied cancer.