Acid Blood. If this creature is killed with a slashing attack, all creatures in a 5 feet radius make a Dexterity Save at DC 11 or take 6 acid damage. If this creature is killed with a piercing attack, the creature that killed the Xenomorph must make a Dexterity Save at DC 12 or take 6 acid damage

Genetic Copying. The Xenomorph may have one trait of the species it was born from. If it comes from a human, it can communicate up to a mile away from another Chestburster or Xenomorph that came from a human.

Royal Guard. If this creature is within 20 feet of a "Xenomorph (Queen)", than any melee attack against the Praetorian and the Queen will have disadvantage.

Bite. Melee Weapon Attack: +3 to hit, reach 5 ft., 1 target. Hit: 8 (1d10 + 3) piercing damage.

Tail. Melee Weapon Attack: +5 to hit, reach 10 ft., 1 target. Hit: 9 (1d12 + 3) bludgeoning or piercing damage.

This creature can only make 1 bonus action if it has 15 or less hit points left.

Opportunity Attack. When a creature exits the Xenomorph's attack range, the Xenomorph can make a Tail attack on that creature as an extra action.