Leviathan siege drill

"A Weapon with the Armourbane Special Rule counts Glancing Hits as Penetrating Hits."
When making Armour Penetration tests for an attack with this Special Rule, a result that is equal to, or greater than, the target Armour Value inflicts a Penetrating Hit. A Weapon with this Special Rule can never inflict a Glancing Hit, and any Rule that would force them to do so instead inflicts a Penetrating Hit.