Oath of Moment
If your Army Faction is ADEPTUS ASTARTES, at the start of your Command phase, select one unit from your army and one unit from your opponent’s army. Until the start of your next Command phase, each time a model from the unit (from your army) you chose makes an attack that targets the enemy unit your chose, you can re-roll the Hit roll and you can re-roll the Wound roll.

Design Note
Some units have rules which state (hopefully in consistent language along the lines of “When chosen for Oath of Moment”) they gain additional bonuses when chosen as the unit from your army for Oath of the Moment. If another rule would have such a unit “counts as under the effect of Oath of the Moment when attacking” then they do not gain the additional bonus (because they were not chosen, they're just under the effect). They can, however, use Stratagems requiring a unit be “under the effect of Oath of Moment.”

Gladius Strike Force Detachment

Unchanged from the current Index, except for Bolter Discipline

Bolter Discipline - 15 Points
ADEPTUS ASTARTES model only. While the bearer is attached to a unit, ranged weapons with either “Bolt” or “Bolter” in their name in that unit have the [SUSTAINED HITS 1] ability. If the ranged weapon already has [SUSTAINED HITS 1], then it becomes [SUSTAINED HITS 2]. In addition, while the bearer’s unit is under the effects of the Devastator Doctrine, each time a model in that unit makes a ranged attack, a successful unmodified Hit roll of 5+ scores a Critical Hit.