The Necessary Evil (Mal Necesario) is the intermediate name adopted by the group that later became Rintrah. The sequence of names is: Señores de York (Lords of York), Curiales, Mal Necesario, Rintrah.
Mabrón witnessed the change with the remark “¡Qué sutiles!” (“How subtle!”). The name marks the transition toward a more energetic and chaotic identification, and each change of name marks a change in the group’s tactical and ethical orientation.