The Nine Demons (1984)

Joey and Gary, two childhood friends who are both well versed in the deadly martial arts, are the only two remaining survivors of a ruthless coup, perpetrated by mutinous servants, against Gary's family estate. With Gary in captivity, about to be executed, Joey accidentally stumbles into the underworld (hell) while trying to escape, where he meets the prince of darkness himself. Left with no other options, Joey sells his soul to the devil in exchange for the power to control nine vicious demons that will aid him in his quest to rescue his friend and restore his estate. Joey's actions however end up having unintended consequences, eventually leading to a bloody power struggle between rival factions.