If your Army Faction is Adeptus Astartes, you can use this Black Spear Task Force Detachment rule.
Your army can include Adeptus Astartes Deathwatch units, but it cannot include any Adeptus Astartes units drawn from any other Chapter.
With the exception of Kill Team Cassius, your army cannot include any Agents OF The Imperium Deathwatch units.
Your army cannot include any of the following units: Assault Squad; Assault Squad with Jump Packs; Attack Bike Squad; Devastator Squad; Land Speeder Storm; Relic Terminator Squad; Scout Bike Squad; Scout Squad; Scout Sniper Squad; Tactical Squad; Terminator Assault Squad; Terminator Squad.
Mission Tactics
At the start of your Command phase, you can select one of the Mission Tactics listed below. Until the start of your next Command phase, that Mission Tactic is active and its effects apply to all units from your army with this ability. Each Mission Tactic can only be selected once per battle.
Furor Tactics
Malleus Tactics
Purgatus Tactics
Mission Tactics
Timing
Start of your Command phase
Sequence
Select one Mission Tactic to be active until the start of your next Command phase. Each Mission Tactic can only be selected once per battle.
Furor Tactics
While this Mission Tactic is active, weapons equipped by Adeptus Astartes units from your army have the Sustained Hits 1 ability.
Malleus Tactics
While this Mission Tactic is active, weapons equipped by Adeptus Astartes units from your army have the Lethal Hits ability.
Purgatus Tactics
While this Mission Tactic is active, each time an Adeptus Astartes unit from your army makes an attack, if a Critical Hit is scored, that attack has the Precision ability.
Enhancements
Thief of Secrets
Adeptus Astartes model only. Improve the Strength, Damage and Armour Penetration characteristics of the bearer's melee weapons by 1. At the end of the Fight phase, if one or more enemy models were destroyed as a result of a melee attack made by the bearer this phase, until the end of the battle, improve the Strength, Damage and Armour Penetration characteristics of the bearer's melee weapons by 2 instead.
+10
The Tome of Ectoclades
Watch Master or Captain model only. Once per battle, after you have selected your Oath of Moment target, the bearer can use this Enhancement. If it does, select a second enemy unit to be an Oath of Moment target.
Designer's Note: This means that each time a model with the Oath of Moment ability makes an attack that targets either of your Oath of Moment targets, you can re-roll the Hit roll.
+15
Osseus Key
Watch Master or Techmarine model only. At the start of your opponent's Shooting phase, select one enemy Vehicle unit excluding Titanic units within 12" of and visible to the bearer. That unit must take a Leadership test. If that test is passed, until the end of the phase, each time a model in that unit makes an attack, subtract 1 from the Hit roll; if that test is failed, that unit is not eligible to shoot this phase.
+20
Beacon Angelis
Adeptus Astartes model only. Models in the bearer's unit have the Deep Strike ability. In addition, you can target the bearer's unit with the Rapid IngressStratagem for 0CP.