Aggressive. As a bonus action, the orc can move up to its speed toward a hostile creature that it can see.
Corrupted Carrier. When the orc is reduced to 0 hit points, it explodes, and any creature within 10 feet of it must make a DC 13 Constitution saving throw. On a failed save, the creature takes 14 (4d6) poison damage and becomes poisoned. On a success, the creature takes half as much damage and isn't poisoned. A creature poisoned by this effect can repeat the save at the end of each of its turn, ending the effect on itself on a success. While poisoned by this effect, a creature can't regain hit points.
Nurtured One of Yurtrus. The orc has advantage on saving throws against poison and disease.
Claws. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit:4 (1d4 + 2) slashing damage plus 2 (1d4) necrotic damage.
Corrupted Vengeance. The orc reduces itself to 0 hit points, triggering its Corrupted Carrier trait.
To the common folk of the world, an orc is an orc. They know that any one of these savages can tear an ordinary person to pieces, so no further distinction is necessary.