On February 16, 2012, Metro was repackaged under the ring name "Diamante Azul" (Blue Diamond). He was given a blue mask, trunks and a cape, which all closely resembled the mask and ring gear of lucha libre legend Blue Demon and his successor Blue Demon, Jr.[15] On the August 3 Super Viernes show, Diamante Azul and Atlantis defeated Dragn Rojo, Jr. and ltimo Guerrero to win the CMLL World Tag Team Championship.[16] On the October 12 Super Viernes show, Diamante Azul won the 2012 Leyenda de Azul tournament, a tournament named after Blue Demon.[17][18] On November 11, 2012, New Japan Pro-Wrestling (NJPW) announced that Diamante Azul and Rush would team up under the name CMLL Asesino (CMLL Assassins) for the 2012 World Tag League, that would take place from November 20 through December 2.[19] On November 13, 2012, Atlantis and Demonio Azul lost their tag team championship to El Terrible and Tama Tonga.[20] Diamante Azul and Rush entered the World Tag League on November 21, defeating former four-time IWGP Tag Team Champions Tencozy (Hiroyoshi Tenzan and Satoshi Kojima) in their opening match.[21]