Discipline of Black Guardians

Use this Stratagem when you select an
ULTHWE GUARDIANS unit to shoot or fight.
Until the end of the phase, each time a model in
that unit makes an attack, add 1 to that attack's
hit roll.
The Black Guardians of Ulthwe are professional
soldiers that have a discipline and skill exceeding
that of their civilian counterparts in other craftworlds.