The December 2008 El Castillo del Terror (Spanish for "The Tower of Terror") was a major lucha libre event produced and scripted by the Mexican International Wrestling Revolution Group (IWRG) professional wrestling promotion on December 21, 2008. The El Castillo del Terror show was the ninth ever IWRG El Castillo del Terror event held and the second held in 2008, less than two months after the first 2008 El Castillo del Terror show. The main event was the eponymous Castillo del Terror (Spanish for "Tower of Terror") Steel cage match where the last person eliminated would be forced to take off his wrestling mask or have his hair shaved off as a result of the loss.