That was my assumption, that Lifesight is a 6th sense- the 'radiates like as if a torch' isn't a physical torch or even a literal light source, it's just how the creature with the feat perceives the life energy inside a target creature.<br/><br/>The idea is for Methu to be the lure to get Grimjaw moving in his direction, where Galyxx's lifesight will be able to detect his approach and thus neither of them will be surprised when the assassin goes for the kill. Galyxx can't wear the illusionary disguise because of Natural Invisibility - an illusion doesn't help if you can't see it anyways.