Stormwrath Bolts

When you give a model this Relic, select one bolt weapon (see Codex: Space Marines) that model is equipped with. When the bearer shoots with that weapon, you can choose for it to fire a stormwrath bolt. If you do, you can only make one attack with that weapon, but the weapon has a Strength characteristic of 7 and an Armour Penetration characteristic of -1 for that attack. If the target of that attack is a MONSTER, the weapon has a Damage characteristic of D6 for that attack.