He was not seen in season three of the series until the finale Ultima Lucha Tres, where he attacked Mil Muertes and stole the gauntlet that was contested for by Muertes, Jeremiah Crane and Brian Cage. The storyline started at the end of season 3 and continued into season 4, with King Cuerno and Muertes receiving a double disqualification on September 12, 2018. A week later the feud between King Cuerno and Muertes distracted both wrestlers from their match, allowing Pentagón Dark (previously known as Pentagón Jr.) to successfully defend the Lucha Underground Championship against the two. The rivalry between the two ended inconclusively in a match where Pentagón Dark defeated King Cuerno, Mil Muertes and El Dragon Azeca Jr. on September 26, 2018, which was the last time the two faced off in the Lucha Underground Championship. He was released from his contract on March 26, 2019.
