Healing potions & balms

If a Wolf Priest equipped with healing potions and balms joins a unit, you may ignore the first failed saving throw each turn for the unit. The potions will not work on a model that has suffered Instant Death or that has been hit by a weapon that allows no save. It may not be used if the Wolf Priest is in base contact with an enemy model. The Wolf Priest cannot use the potions and balms on himself.