On October 25, 2003, Onyx finally won the Heavyweight Championship after defeating Shawn Hernandez. He then defended the title against the likes of Rudy Boy Gonzales, Chance Prophet and Abyss before engaging in a feud with Ray Gordy, who he also defeated to retain the championship. Onyx would then lose the title to Jason Cross on September 4, 2004 to end his reign at 315 days, the longest single reign in the championship's entire history. After Gordy defeated Cross for the title on December 4, Onyx defeated Gordy on the same day to win his second Heavyweight Title, thus reigniting their feud. Onyx held the title for a few months before losing it to Rainman on March 26, 2005 in a three-way match also involving Gordy. One month later, Onyx defeated Rainman to win his third and final Heavyweight Championship on April 30. Wildside closed down immediately afterwards, resulting in Onyx becoming the shortest reigning Heavyweight Champion as a result.