Double the Death Stormfiends equipped with doom-flayer gauntlets, grinderfists or shock gauntlets re-roll all failed To Wound rolls in the Close Combat phase (including Impact Hits and Stomps). Stormfiends equipped with ratling cannons, warpfire projectors or windlaunchers re-roll all failed To Wound rolls when shooting with these weapons.
Warpstone-laced Armour Stormfiends equipped with doom-flayer gauntlets or shock gauntlets have warpstone-laced armour that gives them a 4+ armour save. If a unit of Stormfiends includes one or more models with warpstone-laced armour when armour saves are taken, then use their armour save of 4+ against all of the Wounds that have been inflicted. However, any Wounds that are not saved must be applied to models with warpstone-laced armour before any are applied to models with light armour. If this creates a gap in the unit, move a model up from the back rank to fill the gap. If the unit consists of only a single rank, close the gap by moving the remaining models sideways towards the centre of the gap.
Any attacks, spells or special rules which allow you to target a specific model ignore this special rule, and use the armour save of the model that is targeted; if the target has warpstone-laced armour save it has a 4+ save, and if not it has a 6+ armour save.