Command Re-Roll

WHEN: In any phase, just after you have made a
Hit roll, a Wound roll, a Damage roll,
a saving throw, an Advance roll, a Charge roll,
a Desperate Escape test, a Hazardous test,
or just after you have rolled the dice to determine
the number of attacks made with a weapon,
for an attack, model or unit from your army.
EFFECT: You re-roll that roll,
test or saving throw.