From the 6th world of METAL, Dead Immortal is 1000 percent immortal yet he is unable to use his full power as it was shifted from him to 7lore.  Before 7lore existed all souls entering and leaving the spirit world had to face judgment from dead immortal to determine if they should be kept or discarded as dust or light.  He can only be summoned in a pitch black room and he cannot speak any words until the sound barrier is broken via metal sounds.  Ghost chainsaws and buzzing can be heard during converstations with dead immortal and there is a connection to the 4th world of FOREST.  In the FOREST world dead immortal hopes to one day regain his abilities and overtake the new current 7lore!