The invisible guy who kills everybody Meta is an ultimate being that cannot be killed even by Chuck Norris . He was injected with pure gruntiness in a secret project called project Freelancer, where spartans are given gruntiness and given armor abilities which seem too advanced to be made by humans as it is more advanced than the Covenant . I mean, that makes no sense, how could they find FIFTY different kinds of technology that could stop time but failed to kill the flood Aids? I mean really.