 In a YouTube video , bassist Reginald " Fieldy " Arvizu affirmed that a charity song titled " A Song for Chi " would be released , featuring Slipknot guitarist Jim Root , Clint Lowery of Sevendust , drummer Dave McClain of Machine Head and former Korn guitarist Brian " Head " Welch , among many other musicians . The song was intended to raise money for Deftones bassist Chi Cheng , who fell into a comatose state following a car accident in November 2008 . 
