Make a ranged spell attack against a target composed partially or totally of metal non-resistant to corrosion. If the attack hits and if the target is a living creature, it make a constitution saving throw. On an failure it takes 5d10+20 necrotic damage and half that on a success. This damage ignores necrotic resistance. Immune creatures take half damage. In the case of a critical failure, the creature is stunned until the end of its next turn.

If the target creature is a Phyrexian, it makes the constitution saving throw with disadvantage and takes additional 5d10+20 Necrotic Damage.