AUSPEX SCAN

Use this Stratagem at the end of Reinforcements
step of your opponent's Movement phase. Select
one ADEPTUS ASTARTES INFANTRY unit
from your army that is not within Engagement
Range of any enemy units. That unit can shoot
as if it were your Shooting phase, but its models
can only target a single eligible enemy unit that
was set up as Reinforcements this turn and that
is within 12" of their unit when doing so.