Great Unclean One

Models that cause Terror also cause Fear. In addition,
the following rules apply. Fear-causing models or
models with Immunity (Fear) treat Terror-causing
monsters as causing Fear, rather than Terror – this is an
exception to the rule that makes Fear-causing creatures
immune to Fear. Terror-causing models have the
Immunity (Fear/Terror) special rule.

Run for Your Lives!
If a Terror-causing creature declares a charge, the target unit must immediately take a Panic test. If the test is passed, all is well and the unit can declare charge reactions normally. If the test is failed, the unit must make a Flee! charge reaction. Note that, if the target unit is not allowed to take any charge reaction (if, for example, the Terror-causing unit charged as a result of a pursuit or a random move), then the target does not take this test.

If a unit wishes to declare a charge against an enemy that causes Terror, it must take a Psychology test to overcome its terror first. If the test is failed, it may not declare the charge against the Terror-causing unit, but may choose to declare a charge against another unit following the rules for Redirecting a Charge. If the Psychology test is passed, the unit may declare the charge as normal.

The model can make a Stomp in addition to its other close combat attacks. A Stomp has Always Strikes Last, and inflicts D6 (or D3 against lone Infantry models and skirmishers) automatic hits, at the model's S, on one enemy Infantry, War Beasts or Swarm unit in base contact with the model.

When charging, units entirely made of models with Swiftstride and M 7 or higher roll 3D6, discard the lowest result, and add the result to their M value. When fleeing or pursuing, they roll 3D6, rather than 2D6.

When charging, units entirely made of models with Swiftstride and M 6 or lower roll 2D6, and add the result to their M value. Whenfleeing or pursuing, they roll 3D6, and discard the lowest result.

Swiftstride has no effect on models using a M value lower than 4.

Swiftstride M6 or lower
Charging: M + 2D6
Failed Charge: 2D6
Fleeing/Pursuing: 3D6 (discard the lowest)

Swiftstride M7 or more
Charging: M + 3D6 (discard the lowest)
Failed Charge: 3D6 (discard the lowest)
Fleeing/Pursuing: 3D6

A model with Poisoned Attacks gains a +1 modifier to any To Wound rolls. Armour saves are modified by the Strength of the attack as normal.

Unless otherwise stated, a model with this rule has both Poisoned shooting and close combat attacks. Any spells cast by the model are unaffected, as are any special attacks or attacks made with magic weapons they might be wielding, whether they be shooting or close combat attacks.

Daemons of Nurgle have Hatred (Daemons of Tzeentch). Enemy models in base contact with a Daemon of Nurgle suffer a -1 penalty to their WS.

They treat Daemons of Khorne and Slaanesh as Suspicious Allies, and Daemons of Tzeentch as Desperate Allies.

All models with Daemonic have Fear, Immunity (Poisoned Attacks, Psychology), Magical Attacks (including all weapons) and Ward save (5+) (except mounts). In addition, they are also subject to the following special rule:

Daemonic Instability: When a unit of Daemons loses a combat it must take a special kind of Break test called a Daemonic Instability test, instead of taking a normal Break test. To do this, use the following procedure:

1) Calculate combat result as normal and roll 2D6.

2) If the dice roll is a double 1 or double 6, something unexpected happens:

Double 1 Reality Blinks: All Wounds suffered by the unit this Close Combat phase, including any Wounds suffered by characters that have joined it, are restored, and any models removed as casualties in this phase immediately return to play in their earlier positions. Wounds restored in this manner still count as having been inflicted for the purposes of combat results.

Double 6 Banished! Remove the unit from play as a casualty.

3) Now (assuming the unit has not been wiped out when resolving a double 6) apply the difference in combat results as a penalty to the Daemons' LD characteristics. For every point by which the 2D6 roll exceeds this modified LD value, the unit suffers one additional Wound, with no saves of any kind allowed.

If characters are present in the unit, the controlling player first allocates Wounds to the unit (up to their current Wounds), then divides remaining Wounds as equally as possible amongst any characters. Once all Wounds have been allocated, the penalty to the Daemons' LD is discounted. They can, be rerolled if the battle standard is within 12", use the General's Inspiring Presence rule, and/or be tested on unmodified LD if the unit is Stubborn or Steadfast. If a Daemonic unit somehow is Unbreakable, it takes no Daemonic Instability test.

Enemy models in base contact with the Great Unclean One at the start of any close combat phase suffer a Wound on the roll of a 5+ which Ignores Armour saves. This has no effect on Animated Constructs or Daemons of Nurgle.