The Xenomorph Razor Claw.

The Xenomorph Razor Claw is a large Scour caste threat. Their large claws allow them to rapidly shred through targets whilst remaining barely harmed in the process due to their sheer speed. Not only are they incredibly fast, they begin to “buff” themselves once in combat.
Razor Claws upon attacking targets apply Bloodloss to them.
Razor Claws can be seen their two front “tusks.” These serve no actual purpose and are simply a visual design choice.
As Razor Claws loose health, their speed buff begins to increase more and more. Failing to kill it may render it in an additionally powerful state for awhile even after combat.

(Particle indicator showing a Razor Claw in a state of being buffed.)
Razor Claw Stats.