Warding Brand

A fiery sigil causes any who harm these warriors to be
wreathed in flames.
If successfully cast, pick 1 friendly unit wholly
within 18" of the caster and visible to them.
Until the start of your next hero phase, roll a
dice each time a wound inflicted by a melee is
allocated to a model from that unit and not
negated.
On a 4+, the attacking unit suffers 1 mortal
wound.