Editing Codex - Tyranids: /tg/'s 8th Edition (section)

==Army Rules==
===Universal===
*'''Instinctive Behaviour:''' ''Unless controlled or coordinated by the domineering will of the Hive Mind, many Tyranid organisms will revert to their baser instincts.''
::Unless a {{W40kKeyword|<HIVE FLEET>}} unit with this ability is within synapse range of any friendly {{W40kKeyword|<HIVE FLEET>}} {{W40kKeyword|Synapse}} unit, you must subtract 1 from any hit rolls made for it when shooting any target other than the nearest visible enemy unit, and you must subtract 2 from its charge roll if it declares a charge against any unit other than the nearest enemy unit.

*'''Shadow in the Warp:''' ''The unfathomable presence of the Hive Mind radiates out from its synapse creatures, smothering the ability of the psykers who stand before them to draw upon their mystic powers.''
::Enemy {{W40kKeyword|Psykers}} must subtract 1 from any Psychic tests they make and from their Leadership characteristic if they are within 18" of any units with this ability. {{W40kKeyword|Tyranid}} {{W40kKeyword|Psykers}} are not affected.

*'''Synapse:''' ''Some Tyranids serve as synaptic conduits or nodal relays through which a portion of the Hive Mind’s iron will flows, overriding the natural instincts of the swarm.''
::{{W40kKeyword|<HIVE FLEET>}} units automatically pass Morale tests if they are within 12" of any friendly {{W40kKeyword|<HIVE FLEET>}} units with this ability. Also, {{W40kKeyword|<HIVE FLEET>}} units don't suffer from ''Instinctive Behaviour'' if they are within 24" of any friendly {{W40kKeyword|<HIVE FLEET>}} units with this ability.

===Detachment Rules===
*'''Extensions of the Hive Mind:''' ''The organisms that make up a Tyranid army are all extensions of the psychic gestalt known as the Hive Mind – its tendrils and its jaws, all working with a single purpose.''
::If your army is Battle-forged, all Troops units in Tyranids Detachments gain this ability. Such a unit that is within range of an objective marker (as specified in the mission) controls the objective marker even if there are more enemy models within range of that objective marker. If an enemy unit within range of the same objective marker has a similar ability, then the objective marker is controlled by the player who has the most models within range of it as normal.

*'''Hive Fleet Adaptations:''' ''Each of the hive fleets has its own distinct methods of predation, from the movement patterns of entire swarms to the behaviours and morphology of individual organisms.''
::If your army is Battle-forged, all units in Tyranids Detachments gain a Hive Fleet Adaptation, so long as every unit in that Detachment is from the same hive fleet. The Hive Fleet Adaptation gained depends upon the hive fleet they are from, as shown in the table below. For example, a {{W40kKeyword|BEHEMOTH}} unit with the Hive Fleet Adaptation ability gains the ''Hyper-aggression'' adaptation.