GRAV PULSE

Use this Stratagem in either:
• Your Movement phase, when an Adeptus
Astartes Repulsor Field unit from your army Falls
Back. Until the end of the turn, that unit is still eligible to shoot even though it Fell Back.
• Your opponent`s Charge phase, when an
Adeptus Astartes Repulsor Field unit from your
army is selected as a target of a charge. Until the
end of the phase, subtract 2 from charge rolls
made for any unit that declares a charge against
that unit.