A Shield can be used as a martial weapon for attacks, using the statistics listed for a Shield bash on the Martial Melee Weapons table. The Shield bash is an option only for Shields that weren’t designed to be used as Weapons. A Shield can’t have runes added to it. You can also buy and attach a Shield boss or Shield spikes to a Shield to make it a more practical weapon. These can also be found on the Martial Melee Weapons table. These work like other Weapons and can even be etched with runes.