The Cross of Fire (クロスオブファイヤー Kurosu obu Faiyā) is, according to Amadum, the embodiment of the power of the Kamen Riders and the monsters that they face, symbolized by a burning crucifix representing the sign of their sin, in being creations of evil. That shared origin allowed Amadum to absorb their powers, strengthening himself. Furthermore, because they strayed from the path of evil, Amadum considered them flawed creations compared to himself and the monsters who continued in that path.