Editing Codex - Tyranids: /tg/ edition (section)

=== Standard 40k === 

All units in these formations may take a Tyrannocyte or Malefactor as a dedicated transport if they are applicable.  

*'''Lictor Forest Brood:''' This Formation consists of 5 Lictor broods (which act as if they were a single unit), and replaces the Stealth rule with the shrouded rule.
*'''Manufactorum Genestealers:''' This Formation consists of 5 Genestealer Broods (which may not include additional Genestealers, a Patriarch,, or a Broodlord, but the genestealers may be replaced by Ymgarl Genestealers). If they Infiltrate to deploy into a Building or Ruins, they can deploy up to 6" of an enemy unit.  
*'''Deathleaper's Assassin Brood:''' This formation consists of Deathleaper and 5 Lictor Broods and may include up to two Dimachaeron Broods; any unit within 12" of any model in the formation gets a -1 penalty to Leadership, and also benefits from Preferred Enemy (Characters and Independent Characters).
*'''Broodlord's Hunting Pack:'''  This formation consists of 3 Genestealer Broods (each of which may contain a broodlord, but only one Genestealer Patriarch can be taken). If they arrive from Reserves, they can set up in any unoccupied Building or a Ruin (although they have to be more than 6" away from enemy units in the latter case). In addition, they gain Preferred Enemy towards a unit of your choice when they deploy.  The Genestealer broods may be replaced by Ymgarl genestealer broods, if this is done, if a Genestealer patriarch has been taken it must be replaced with a Ymgarl Genestealer Patriarch.  
*'''Gargoyle Bio-Bombs:''' This formation consists of 3 Spore Mine Clusters and 3 Gargoyle Broods and may include up to three Simurgh Broods. If a Spore Mine Cluster in the formation starts a move (including Run or Charge) within 6" of a Gargoyle from the Formation, it can move 6" in the movement phase and will not halve the distance rolled if it runs or charges. The spore mine clusters may be replaced by Meiotic or Mucolid Spores.   
*'''Endless swarm''': This formation consists of  one to three broods of hormagaunts, one to three broods of termagants, and one brood of Warriors, who all gain objective secured.  Any time a warrior, hormagaunt, or termagant brood is wiped out, roll a d6, on a 4+ the unit is instead placed into ongoing reserves and may re-enter play as per the rules of ongoing reserves.  Up to five Tervigons may be added to this formation, three of which must take a free upgrade to spawn Hormagaunts and two of which must spawn Termagants.  Hormagaunts and Termagants spawned from these Tervigons also have objective secured and may re-enter play if wiped out, and like Tervigons from an Incubator node, these Tervigons are only exhausted if they roll triples on their spawning dice.
*'''Incubator node'''': This formation consists of one to three broods of Termagants and one Tervigon brood.  The Tervigon may be upgraded to spawn Hormagaunts, Rippers, Skyslashers, Simurghs, or Gargoyles instead for free.  In which case, replace the mandated Termagant broods with the appropriate broods. Tervigons in this formation are only exhausted on rolling a triple on their 3d6 spawning dice.  
*''''Synaptic swarm'''': A Tyranid Prime (which may be upgraded to an Apex strain Prime) joins three broods of Warriors, one of which may be an Alpha Warrior Brood; and each warrior in the formation gains an additional six inches to its synapse range.  Warrior broods used in this formation may be used in any formation other then a second synaptic swarm
*'''Psychic Choir Node''': Three to Six broods of Zoanthropes (with the Option to add the Doom of Malan'tai), Two Maleceptor Broods, the option for two Tervigon broods, and one Hive Tyrant (with optional tyrant guard brood) who may be replaced with the Swarmlord, all of whom consider their power dices successes on rolls of one better than before for manifesting powers and denying (usually improving to warp dice succeeding on a 3+ and denying to a 5+) and add a one to any perils of the warp rolls and extend their synapse range by 6". 
*'''Skyblight swarm''': This formation consists of a winged hive tyrant (and winged Tyrant Guards if so chosen), 0-1 Harpy Broods, 0-1 Hive Crone Broods, 0-1 Erinyes Broods, and one to three Gargoyle broods and one to three Simurgh Broods.  The Gargoyle and Simurgh broods have objective secured, and if wiped out, the controlling player must roll a d6, on a 4+ the Gargoyle or Simurgh brood is placed into ongoing reserves and may re-enter play from reserves.
*'''Living artillery node''':  An Exocrine joins 3 Biovore broods and a Warrior Brood with a Venom Cannon or a Barbed Strangler. This gives everyone Pinning on their shooting and the ability to re-roll the scatter die when firing a Blast or Barrage weapon. The warriors may be replaced with a Tervigon which must use a monstrous bio-cannon, a Zoanthrope Brood, or a Hive Tyrant who must use a monstrous-biocannon. The Exorcine brood may be replaced with a Dactilys brood.  
*'''Bio-blast node''': A Tyrannofex brood joins 3 Carnifex broods, each with a monstrous biocannon, and a Warrior brood with a biocannon. For this, the entire formation gets Split Fire and any friendly unit within the 12 inches of the Synapse creature can reroll 1s to Wound in shooting. The Warrior brood may be replaced with a Tervigon which must use a monstrous bio-cannon, a Zoanthrope Brood, or a Hive Tyrant who must use a monstrous bio-cannon and may include Tyrant Guard. 
* '''Gunner Node''': This formation consists of a Hive Tyrant with a monstrous bio-cannon, a Hive Guard Brood that the Hive Tyrant may join as if they were Tyrant Guard, and a pair of Exocrine Broods.  The entire formation considers its ballistic skill as being one higher, and may choose to use skyfire at the start of a turn (if three-dimensional thought patterns is purchased, they instead gain interceptor, if that is also already purchased, the formation's ballistic skill is improved by a further one step).
* '''Hypertoxic Node''': This formation consists of a Hive Tyrant that must have Toxin sacs (if joined by Tyrant guard, the Tyrant guard must also have toxin sacs), a toxicrene brood, and three venomthrope broods with the option of a Crinis brood.  The Malanthropes and the venomthropes gain an additional six inches to their spore clouds, while the entire formation gains toxic miasma that can be used every turn, and the Venomthropes and Hive tyrants inflict instant death on a 5+ to wound, or improve any existing conditional instant death (such as through implant attack or boneswords) by two steps.  The venomthropes may be replaced by malanthropes.
* '''Neural Node''': This formation consists of a maleceptor brood and up to three zoanthrope broods that may include a Neurothrope and may include the Doom of Malan'tai.  The Synapse range of all units in the formation is extended by six inches, and reroll warp dice to manifest powers or deny the witch.   This formation may be joined to the Psychic Choir Node with two Neural Nodes takien as part of the Node, in which case the benefits stack (increasing synapse range by a total of twelve and improving the likelihood of manifesting powers, with shadow in the warp's effects being doubled to -4 leadership and -2 on attempts to harvest warp dice).  
*'''Urban cleansing node''': One unit of warriors with Greater Stranglers, two units of Pyrovores, and a Tyrannofex with Acid spray.  All models part of the Urban-Cleansing node re-roll to wound and penetrate and re-roll number of hits dealt in overwatch taking the highest.  The Pyrovores and warriors gain move through cover.  A Hive Tyrant and Tyrant Guard may be taken with this formation, but the Tyrant must have a Thorax biomorph.  Urban Cleansing Nodes taken as part of a Hive Fleet moloch detachment may assault through ruins at initiative.
*'''Wrecker node''': This formation consists or three Carnifex broods, a Trygon or a Dimachaeron brood and a warrior brood; all members of the formation must use all melee weapons.  The warrior brood may be replaced by a Hive Tyrant who must use all melee weapons and their Tyrant guard brood, a Tervigon who must use all melee weapons and must spawn Hormagaunts (though the upgrade will be free), or a Trygon prime.  All friendly units within 12 inches of the synapse creature may reroll 1st to wound in assault and all units part of the formation gain an additional hammer of wrath hit.  
*'''Tyrant Node''': A walking Tyrant takes a brood of Tyrant Guards and a Venomthrope Brood. The Tyrant gains an additional six inches to Synapse and the Venomthropes' spore cloud expands by six inches.  The Hive Tyrant may be replaced with the Swarmlord and the Venomthropes by Malanthropes who also gain a bonus to synapse and their spore cloud and a Toxicerene may be added, which 
*'''Subterranean Swarm''': This formation consists of a Trygon Prime, a Trygon Brood, a Mawloc brood, and three warrior broods. The whole formation is considered a single entity for the purposes of ongoing reserves, and when deployed the Trygon Prime must be the first model deployed, and all other units in the formation may deepstrike without scattering within one inch of the Trygon prime or another unit in the formation.  The formation may shoot or run upon entering from reserves.  
*'''Skytyrant Swarm''':  A Winged Hive Tyrant (may take winged tyrant guard brood) takes two to six broods of Gargoyles and two to six Simurgh Broods and increases its synapse range by six inches, and one Shrike brood and one Sky-slasher brood may be taken for every two broods of Gargoyles and Simurghs who also gain six inches to their Synapse range. The Tyrant may expend a gargoyle to gain look out sir! on a 2+, and all flying monstrous creatures and jump infantry friendly to the player gain preferred enemy (everything!) as long as they remain in synapse range.  
*'''Sporefield''': One to Three Mucolid Clusters can join with one to three Spore Mine Clusters and may be joined by up to three Meiotic Spore clusters. They all gain Infiltrate and if any unit is wiped out, it may re-enter reserves on a 4+, units from this formation do not give kill points.  
*'''Skytide''' (It might be best to make Skytide another Decurion focused on Flier and Jump infantry spam) This formation consists of three Skyblight swarms, a Skytyrant Swarm, and up to three Sporefield.  The benefits of all other formations stack, thus all gargoyles, simurghs, shrikes, and sporefields may be entered from reserves on a 4+ that must be rerolled if failed if wiped out and all synapse creatures gain six inches of range to their synapse.  All units in the formation gain preferred enemy (everything!) while in synapse range, and a shrike brood and sky-slasher brood for every two gargoyle and simurgh broods may be taken.