Poisoned Wind

When a model using a weapon with this special rule makes a roll To Wound, a roll of 5+ is always a success, even if the target’s Toughness is so high that the weapon would not normally be able to wound it. Finally, no armour save is permitted against wounds caused by a weapon with this special rule (Ward and Regeneration saves can be attempted as normal).

Note that models wielding weapons that have this special rule are immune to this special rule.