Use this Strategem when a Grey Knight unit from your Army that is not a Vehicle or a Servitor is chosen as a target for an attack. Until the end of phase, when resolving an attack made against that unit, an unnmodified wound roll of 1-3 always fails, irrespective of any abilities that the weapon or the model making that attack may have.
Use this Stratagem in the Fight phase, when a Grey Knights Paladin unit from your army that has not been chosen to fight with this phase is chosen as the target for an attack. Until the end of that phase, when a model in that unit is destroyed, then before that model is removed from play it can fight as if its unit had been chosen to fight.
Use this Stratagem when a Grey Knights Land Raider model or Grey Knights Storm Raven Gunship model from your army is destroyed. That model can either automatically explode (do not roll a D6), shoot with one of its ranged weapons as if it were your Shooting phase, or make one attack with one of its melee weapons as if it were the Fight phase (The Top Profile is used).
Use this Stratagem in the Fight phase. Select one Nemesis Dreadknight unit from your army. Until the end of that phase, add 1 to the Attacks characteristic of that unit, and when resolving an attack made by a model in that unit, you can re-roll a wound roll of 1 and you can re-roll a damage roll of 1.
Use this Stratagem when a Grey Knights unit from your army is set up on the battlefield using the Teleport Strike ability. You can set up that unit anywhere on the battlefield that is more than 3 away from any enemy models instead of 9. If you do, you cannot charge with that unit in this turn.
Use this Stratagem in your Shooting phase, after shooting with a Grey Knights unit from your army. Select one enemy Vehicle or Monster unit that was chosen as a target for that unit's attacks. Until the end of that phase, when resolving an attack made by a model in a friendly Grey Knights unit against that enemy unit, you can re-roll the wound roll.
Use this Stratagem in your Shooting phase, when a Grey Knights Vehicle unit from your army is chosen to shoot with. Until the end of that phase, that unit does not suffer the penalty for moving and firing Heavy weapons.
Use this Stratagem in any phase. Select one Grey Knights Terminator unit from your army. Until the end of that phase, when resolving an attack made by a model in that unit, add 1 to the hit roll.
Use this Stratagem in your Psychic phase. Select one Grey Knights Psyker unit from your army with the Rites of Banishment ability. Until the end of that phase, the range of the psychic powers that unit manifests is increased by 6.
Use this Stratagem when a Grey Knights Dreadnought model from your army is chosen as the target for an attack. Until the end of the phase, when resolving an attack made against that model, halve the damage inflicted (rounding up).
Use this Stratagem at the end of your Movement phase. Select one Grey Knights Interceptor Squad unit from your army. Until the end of the turn, that unit can be chosen to shoot with and charge with even if it Fell Back this turn.
Use this Stratagem in your Psychic phase, after a Grey Knights Psyker unit from your army has manifested a psychic power. Until the end of that phase, when a psychic test is taken for a friendly Grey Knights Psyker unit within 6 of that unit, add 1 to the total.
Use this Stratagem in your opponent's Shooting phase, when a Grey Knights Terminator unit from your army is chosen as the target for an attack. If that unit contains 5 models or fewer, this Stratagem costs 1 Command Point, otherwise, this Stratagem costs 2 Command Points. Until the end of that phase, when resolving an attack made with a ranged weapon against that unit, subtract 1 from the Damage characteristic of that weapon for that attack (to a minimum of 1).
Use this Stratagem in your Shooting phase, when a Grey Knights Infantry unit from your army is chosen to shoot with. Until the end of that phase, for the purposes of the Bolter Discipline ability, that unit is treated as if it had remained stationary in your previous Movement phase.
Use this Stratagem when a Grey Knights Purifier Squad unit from your army is chosen as the target for an attack. Until the end of the turn, models in that unit have a 4+ invulnerable save. When a Morale test is taken for that unit, do not roll the dice - it is automatically passed.
Use this Stratagem when a Grey Knights Purgation Squad unit from your army fires Overwatch. Until the end of the phase, when resolving an Overwatch attack made by a model in that unit, a hit roll of 4-6 scores a hit.