Editing Codex - Tyranids Angry Alien Edition (section)

===ARMY SPECIAL RULES===
A Tyranids army uses a number of special rules that are common to several of its units, which are collected here for your convenience. Special rules that are unique to particular units are presented in the relevant unit entry instead. Other, more common rules are simply listed by name – these are all described in full in the Special Rules section of Warhammer 40,000: The Rules.

====ALPHA WARRIOR====
Tyranid Warriors and Tyranid Shrikes may use this model's Weapon Skill and Ballistic Skill rather than their own.

====ARMOURED SHELL====
A model with this special rule improves its Armour Save by 1. 

====BEYOND NUMBER====
Whenever the last model of a unit with this special rule is removed from the table you may immediately place a new identical unit to the one which that last remaining model belonged to in Ongoing Reserves. This new unit may enter via Deep Strike or Outflank if it has the appropriate special rule. 

====CHAMELEONIC SKIN====
Units consisting entirely of models with this special rule do not scatter when arriving from Deep Strike Reserve.

====DEATH FROM THE SHADOWS====
A unit composed entirely of models with this special rule may assault the same turn it Outflanks or Infiltrates. 

====DUPLICATED REFLEX CHAINS====
A model with this special rule adds +1 to its Initiative characteristic. 

====EXPLOSIVE MUSCLE ACTION====
A model with this special rule adds +1 to its Attacks characteristic. 

====HARDENED CARAPACE====
A model with this special rule adds +1 to its Toughness characteristic. 

====IMPULSE INHIBITORS====
A model with this special rule adds +1.

====IMPROVED VISION====
A model with this special rule adds +1 to its Ballistic Skill characteristic. 

====INSTINCTIVE BEHAVIOUR====
This special rule is always followed, in brackets, by a type: either Lurk, Hunt or Feed, which corresponds to an effect listed below. At the beggining of each of your turns take a Leadership test for each unit including one or more models with this special rule.
*'''Instinctive Behaviour (Lurk):''' 
::When a unit including one or more models with this special rule fails its Leadership test at the start of the turn all models with this special rule in the unit immediately Fall Back as if they had failed a Morale test unless it contains a model with the Fearless special rule in which case nothing happens.
::When a unit including one or more models with this special rule passes its Leadership test at the start of the turn all models with this special rule in the unit gain the Preferred Enemy special rule until the start of your next turn.
*'''Instinctive Behaviour (Hunt):''' 
::When a unit including one or more models with this special rule fails its Leadership test at the start of the unit immediately goes to ground unless it contains a model with the Fearless special rule in which case nothing happens. 
::When a unit including one or more models with this special rule passes its Leadership test at the start of the turn all models with this special rule in the unit gain the Preferred Enemy special rule until the start of your next turn. 
*'''Instinctive Behaviour (Feed):''' 
::When a unit including one or more models with this special rule fails its Leadership test at the start of the turn all models with this special rule in the unit automatically fail all cover saves until the start of your next turn. 
::When a unit including one or more models with this special rule passes its Leadership test at the start of the turn all models with this special rule in the unit gain the Rage special rule until the start of your next turn.

====INSTINCTIVE FIRE====
Each weapon this model is armed with automatically fires at the nearest enemy unit within range and line of sight as if it were attached like a vehicle. The shots are resolved at the end of the Shooting phase before Morale checks are taken. Each weapon can fire at a different target unit, but they cannot be fired in any other way or at any other time.

====KNOW NO HONOUR====
Character models with this rule may not issue or accept challenges, but suffer no penalties for refusing a challenge.

====LORD OF WINGED HORRORS====
Gargoyle Broods, Meiotic Spore Clusters, Sky-slasher Swarm Broods, Spore Mine Clusters and Tyranid Shrike Broods are Troops choices if your Warlord has this special rule.

====OUT OF AMMUNITION====
When firing Shooting weapons at a unit containing one or more models with this special rule, To Hit rolls of 6 must be re-rolled. This has no effect on weapons that do not make regular To Hit rolls (such as Template weapons). 

====PHEROMONE TRAIL====
If a friendly unit from Codex: Tyranids arrives on the battlefield via Deep Strike, it will not scatter so long as the first model in the unit is placed within 6" of a model with this special rule. Note that the model with the Pheromone Trail special rule must already be on the table at the start of the turn for this ability to be used.

====SECONDARY BRAIN====
A model with this special rule adds +1 to its Mastery Level. 

====SHADOW IN THE WARP====
All enemy models with the Psyker, Psychic Pilot or Brotherhood of Psykers special rules suffer a -3 penalty to their Leadership characteristic whilst they are within 12" of a model with this special rule.

====SPAWN HORMAGAUNTS====
Replace Termagants with Hormagaunts in Spawner, Brood Progenitor and Synaptic Backslash rules.

====SPAWN GARGOYLES====
Replace Termagants with Gargoyles in Spawner, Brood Progenitor and Synaptic Backslash rules.

====SPAWN RIPPERS====
Replace Termagants with Rippers in Spawner, Brood Progenitor and Synaptic Backslash rules. When rolling for the number of bases spawned, roll 3D6 and discard the lowest result, though Tervigon still count as exhausted for any double rolled, even if a double was formed with discarded dice.

====SPAWN SKY-SLASHERS====
Replace Termagants with Sky-Slashers in Spawner, Brood Progenitor and Synaptic Backslash rules. When rolling for the number of bases spawned, roll 3D6 and discard the lowest result, though Tervigon still count as exhausted for any double rolled, even if a double was formed with discarded dice.

====SUPERIOR NEURAL CONNECTIONS====
A model with this special rule adds +1 to its Weapon Skill characteristic. 

====SYNAPSE CREATURE====
Models with this special rule are synapse creatures and unless otherwise noted have a synapse range of 12". Synapse creatures within the synapse range of another synapse creature form a synaptic web with that synapse creature and every other synapse creature in that synapse creature's synaptic web. A model within the synapse range of a synapse creature counts its Leadership as being that of the synapse creature in that synapse creature's synaptic web with the highest Leadership value. 

If for example a Termagant Brood was within 12" of a Tyranid Warrior Brood then they would have access to its synaptic web and would be Leadership 7. If the Tyranid Warrior Brood was within 12" of a Tervigon  they would also have access to the Tervigon's synaptic web and would be Leadership 8. If that Tervigon was within 12" of a Hive Tyrant the Termagants would be Leadership 10. 

====SYNAPTIC ENHANCEMENT====
A model with this special rule adds +6" to its Synapse range.