Exemplar of the Mont'ka

This warlord has studied the strategic and tactical
precepts of the Mont'ka, the art of the Killing Blow.
In your Command phase, select one friendly
CORE unit within 9" of this WARLORD. Until
the start of your next Command phase, each time
a Core model in that unit makes a ranged attack
that targets an enemy unit within 9", or 12" if
you selected the Mont'ka Tactical Philosophy
this battle, you can re-roll the wound roll.