SPECIAL RULES
Crawl from the Shadows: All models in this Formation have the Stealth special rule. Models that already have the Stealth special rule also have the Shrouded Special rule.Unnatural Intelligence: Whilst the Spawn of Cryptus is alive, all units in this Formation have the Preferred Enemy special rule.

SPECIAL RULES
Hypertoxic: Any hit inflicted by a model in this Formation that has the Poisoned special rule gains the Instant Death Special rule on a To Wound roll of a 6. Hits inflicted by a Toxicrene in this formation have the Instant Death special rule on a roll of 5 or 6.Miasma of Death: The Hive Tyrant in this Formation has the Toxic Miasma biomorph. In addition, the Hive Tyrant and any models in this Formation that are within 12" of the Hive Tyrant can use their Toxic Miasma in each of their turns, rather than only once per battle.

SPECIAL RULES
A Monstrous Presence in the Warp: Enemy models are affected by the Shadow in the Warp special rule if they are within 18" of the Maleceptor from this Formation, rather than 12" as would normally be the case.Power of the Hive Mind: The Maleceptor in this Formation, and all units from this Formation that are within 12" of the Maleceptor, can re-roll rolls of 1 when they take a Psychic test.

SPECIAL RULES
Objective Secured: All Gargoyle units from this Formation have the Objective Secured special rule. A unit with this special rule controls Objective Markers even if an enemy scoring unit is within range of the Objective Marker, unless the enemy unit also has this special rule.Skyswarm: Each time a Gargoyle Brood from this Formation is completely destroyed, roll a D6: on a 4+ you can immediately place a new unit into Ongoing Reserve that is identical in terms of the original number of models, weapons and upgrades to the unit that was just destroyed. These new units count as being part of the original Formation, so roll a D6 as described above if they are subsequently destroyed. Victory points are awarded as normal for new units in this Formation that have been completely destroyed.

The units in this Formation retain all of the special rules specified from their individual Formation datasheets. In addition, the following special rules apply to the Formation:

SPECIAL RULES
Synaptic Command Network: All other Synapse Creatures from this Formation that are within synapse range of the Hive Tyrant from the Skytyrant Swarm Formation add 6" to their own synapse range.The Swarm Unleashed: As long as the Hive Tyrant from the Skytyrant Node Formation has not been removed as a casualty, you can re-roll failed results when rolling to see if a Gargoyle Brood, Mucolid Spore Cluster or Spore Mine Cluster from this Formation that has been completely destroyed is replaced.

SPECIAL RULES
Command Node: The Hive Tyrant in this Formation adds 6" to its synapse range.Monstrous Flock: The Hive Tyrant and Gargoyles in this Formation are a single unit. The Hive Tyrant can use the Look Out, Sir rule to attempt to re-allocate any Wounds that it suffers onto a Gargoyle model from the unit, and will pass Look Out, Sir rolls on a 2+. The Hive Tyrant cannot leave the unit during the battle, and can only use the Gliding flight mode. The combined unit counts as 3 units for Victory Points purposes if it is completely destroyed.

SPECIAL RULES
Advance Wave: All units in this Formation have the Infiltrate special rule.Sporefield: Each time a Mucolid Spore Cluster or Spore Mine Cluster from this Formation is completely destroyed, roll a D6: on a 4+ you can immediately place a new unit into Ongoing Reserve that is identical in terms of the original number of models, weapons and upgrades to the unit that was just destroyed. These new units count as being part of the original Formation, so roll a D6 as described above if they are subsequently destroyed. Victory points are awarded as normal for new units in this Formation that have been completely destroyed.

SPECIAL RULES
Swoop Forth: If, at the start of this Formation’s Movement phase, the Hive Vanguard’s unit of Gargoyles is within 18" of its Hive Tyrant, it can swoop forth instead of moving; remove the unit from the battlefield, even if it is locked in combat. It then immediately arrives anywhere on the board using the rules for Deep Strike. It will not scatter if it attempts to Deep Strike within 6" of the Tyranid Warriors from this Formation.

SPECIAL RULES
Hidden Beneath the City: Units from this Formation that arrive from Reserve can be set up in an unoccupied Building. Alternatively, they can be set up in Ruins terrain, as long as they are set up more than 6" away from any enemy models.Hunting Pack: Select an enemy unit when the Broodlord from this Formation is deployed. All models from this Formation have the Preferred Enemy special rule against models from the nominated enemy unit.

SPECIAL RULES
 • Preferred Enemy (Character and Independent Character)
Paranoia and Ill Discipline: Any enemy unit within 12" of one or more models from this Formation suffers a -1 penalty to their Leadership characteristic.

SPECIAL RULES
Wings of Death: If a Spore Mine Cluster from this Formation starts a move (including a Run or charge move) within 6" of a Gargoyle unit from this Formation, then the Spore Mine Cluster can move 6" if it is the Movement phase, and does not halve the distance rolled if it Runs or charges.

SPECIAL RULES
Deadly Fruit: Models from this Formation that are within a Forest have the Shrouded special rule instead of the Stealth special rule. In addition, models from this Formation that are deployed within a Forest using the Infiltrate special rule can be set up within 6" of an enemy model.

SPECIAL RULES
 • Hit & Run
Unsuspected: Models from this Formation that are deployed within a Building or Ruins using the Infiltrate special rule can be set up within 6" of an enemy model.

SPECIAL RULES
Endless Swarm: Each time a Hormagaunt or Termagant Brood from this Formation is completely destroyed, roll a D6: on a 4+ you can immediately place a new unit into Ongoing Reserve that is identical in terms of the original number of models, weapons and upgrades to the unit that was just destroyed. These new units count as being part of the original Formation, so roll a D6 as described above if they are subsequently destroyed. Victory points are awarded as normal for new units in this Formation that have been completely destroyed.

SPECIAL RULES
Hyper-progenitive: When rolling to see how many Termagants the Tervigon from this Formation spawns, you must re-roll any rolls of a 1.

SPECIAL RULES
Organic Bombardment: All ranged weapons fired by models in this Formation have the Pinning special rule. In addition, models in this Formation that are within 12" of this Formation’s Tyranid Warrior Brood can re-roll the scatter dice when firing weapons with the Blast or Barrage special rule.

SPECIAL RULES
Synaptic Conduits: All models in this Formation have a synapse range of 18".

SPECIAL RULES
Bio-deluge: All units in this Formation have the Split Fire special rule. In addition, models in this Formation that are within 12" of this Formation’s Tyranid Warrior Brood can re-roll failed To Wound rolls of 1 in the Shooting phase.

SPECIAL RULES
 • Fear
Synaptic Command Network: As long as the Hive Tyrant from the Tyrant Node Formation has not been removed as a casualty, then all other Synapse Creatures from this Formation that are within its synapse range add 6" to their own synapse range.The Swarm Unleashed: As long as the Hive Tyrant from the Tyrant Node Formation has not been removed as a casualty, you can re-roll failed results when rolling to see if a Termagant, Hormagaunt or Gargoyle Brood from this Formation that has been completely destroyed is replaced (see the Endless Swarm or Skyswarm special rules).

SPECIAL RULES
They Came From Below…: All units in this Formation must be placed in Reserve. Make a single Reserve Roll for the entire Formation. When the Formation arrives from Reserve, deploy the Trygon Prime first, by Deep Strike, using its Subterranean Assault special rule. Once the Trygon Prime’s final position has been established, the Formation’s three Ravener Broods immediately enter play.

Place the Ravener units so that all of their models are wholly within 6" of the Trygon Prime’s base and in unit coherency. These models cannot be placed within 1" of enemy models or within impassable terrain; if any models cannot be placed, these excess models are removed as casualties. The Formation’s Ravener Broods cannot move in the Movement phase or charge on the same turn they arrive, but can shoot or Run.

The Formation’s Trygon and Mawloc enter play via Deep Strike as usual.

SPECIAL RULES
Command Node: The Hive Tyrant in this Formation adds 6" to its synapse range.

SPECIAL RULES
Rampage of Destruction: Carnifexes in this Formation inflict D3+1 Hammer of Wrath hits instead of the usual D3. In addition, models in this Formation that are within 12" of this Formation’s Tyranid Warrior Brood can re-roll failed To Wound rolls of 1 in the Assault phase.

TYPE
 • Battle Formation

SPECIAL RULES
 • It Will Not Die
Screamer-killers: If three or more of the Carnifexes in the formation have the bio-plasma upgrade, they can make a single shooting attack each turn with the profile below (choose which model makes the attack). All participating models must be in range and have line of sight to the target.

Range	S	AP	Type
Hellstorm	4+X	2	Assault 1, Plasma Scream

Plasma Scream: Place the hellstorm template so that the narrow end is touching the base of one of the Carnifexes taking part in the attack. X is equal to the number of Carnifexes that are taking part. For example, if three Carnifexes were taking part, the plasma scream would have a Strength of 7.

TYPE
 • Battle Formation

SPECIAL RULES
Bodies Over Bullets: If an enemy unit targets a unit in this formation with a shooting attack, roll a D3. If the result is less than the turn number, the enemy unit can only fire Snap Shots.Without Number: A single unit from the formation may be returned to play after each scheduled break without spending a Strategic Victory Point. This does not count towards the number of units you may return to play after each break.

TYPE
 • High Command

SPECIAL RULES
 • Feel No Pain
Command Node: Any friendly unit chosen from Codex: Tyranids within synapse range of a Hive Tyrant in this formation has the Preferred Enemy and Counter-attack special rules.Fortress of Chitin: If the Living Fortress is targeted by a shooting attack, you can opt to form a Fortress of Chitin. If you do so, the unit has the Shrouded special rule and adds +1 to their armour save rolls until the end of the turn (remember that a dice roll of 1 is always a failure). The formation moves as if in difficult terrain next turn.

TYPE
 • Battle Formation

SPECIAL RULES
Coordinated Attack: All units in this formation must be placed in Strategic Reserve and enter play by Deep Strike. The Trygon Prime must deploy first. Once this is done, the rest of the units from the Subterranean Swarm may be placed anywhere within 12" of the Trygon Prime - do not roll for scatter.Tremor Zone: Once the Subterranean Swarm has entered play, any enemy unit within 6" of a unit from this formation must take a Pinning test. Furthermore, until the beginning of their next turn, all units in a Subterranean Swarm have the Shrouded special rule.