Tyranid Tunnel Swarm
The Tunnel Swarm is a shock attack group that strikes in the mid of the Tyranid's prey, causing confusion and chaos with a small contingency of Hormagaunts. However pending on the Hive's tactics, other swarms may follow in its wake.
Trygonster
The Trygonster evolved like the Hive Tyrant and grown in size compared to the other Trygon's. Its role still remains as the same, however this Trygonster has the ability to connect to the Hive mind and direct the lesser Tyranids. The Trygonster is used mainly against large compact armies like the Orks or Imperial Guard to lead a major assault into the mid of the Tyranid's prey.
Trygons
The monstrous serpentine Trygons creates multiple tunnels along with the Trygonster to ensure that there are multiple routes for other Tyranids to follow.
Lictors
Two groups of Lictors utilises their chameleonic skin to penetrate the enemy and exude a pheromone trail for the Trygons to track and home in. While the chaos ensues as the Trygons erupt from the earth, their primary role complete, the Lictors will disperse and start hunting key prey.