Yautja

Yautja skin description

These usually hunt alone, hunting other aliens worthy of a challenge. They will stalk there prey for weeks on end. Once one strikes it will take the skull of its prey as a trophy, not for eating. These creatures hunt with a dangerous mix of highly futuristic technology, blades, and primal instinct. Once killed (If killed at all) the victim will no longer be seen as prey but more of as a fellow warrior, and will no longer be targeted by the creatures. Technology includes thermal vision, cloaking capabilities, wrist blades, and an armed bomb on a wrist mount. Once close to death the creature will give one final attempt to kill its prey, and ultimately destroy itself in the process with the large explosive. You cant see it, but it sure sees you.