Masters of Combat

Use this Stratagem in the Fight phase, when a
GREY KNIGHTS PALADIN unit from your
Army that has not been chosen to fight with this
phase is chosen as the target for an attack. Until
the end of that phase, when a model in that unit
is destroyed, then before that model is removed
from play it can fight as if its unit had been
chosen to fight.
Forged through a pilgrimage of fire, each Paladin is a
formidable martial force even to their last breath.