Question about the regeneration rule. I had a hero unit with a tough of 3, but with 1 wound remaining. My opponent successfully hit the hero with a deadly(3) weapon, and I failed my defense save. My hero had regeneration ability. Do I roll regen for all 3 deadly, or just 1 since the unit is at 0 wounds. I guess I was thinking if I saved at least on 1 regen roll, I could ignore the other points from deadly, because they would be negative points.