Siege Claw with In-Built Irad-Cleanser

If a model has this special rule, or is attacking with a Melee weapon that has this special rule, they always Wound on a 2+ in close combat.
Similarly, if a model makes a Shooting Attack with a weapon that has this special rule, they always Wound on a 2+.
In either case, this special rule has no effect against Vehicles or Buildings.

A model which loses one or more Wounds to an attack with this special rule and survives has its Toughness value reduced by -1 for the rest of the battle. This effect is not cumulative with other attacks using the Rad-phage special rule, but can be stacked with other special rules that also reduce the Toughness Characteristic of the target. Note that this special rule can never reduce a model to a Toughness value of less than 1.

When a model is allocated a Wound inflicted by a weapon with this special rule, it does not suffer only one Wound but instead a number of Wounds equal to the number in brackets associated with the specific varient of this special rule, with all of the Wounds inflicted using the same AP and special rules as that of the initial Wound. Roll to save against each Wound inflicted separately, but note that Wounds do not spill over to other models and are lost. This special rule has no effect on models that do not hae a Toughness value.

Attacks with this special rule may re-roll failed Armour Penetration rolls against Vehicles and Buildings (both with Shooting Attacks and in close combat) and re-roll Glancing Hits, in an attempt to instead get a Penetrating Hit, but the second result must be kept.

Penetrating Hits caused by attacks made with weapons or models with this special rule add +1 to the result of any rolls on the Vehicle or Building Damage tables.