Phase is the armor enhance ment that agent Alaska secretly has. it allows the user to literaly "phase" through walls and other various solid objects. how ever, there is one little chink. you cant pass through energy feilds like the spartan sheild system or a force feild. upon contact with an energy field the users sheild system will temporarily shut down. Phase can also be used as a week active cammo. feeding further into the belife that insurectionists are seeing "the ghosts of spartans come in and pick their night shift partners one by one"