The defensive shield is one of two, two-handed Shields in the whole of RuneScape. It is used during the Warriors' Guild catapult activity, and you can acquire one of these shields by talking to Gamfred on the 1st floor[?] of the Warriors' Guild. It can only be equipped while standing on the target in in the activity room. This is a slower tactic of obtaining warrior guild tokens compared to killing Animated armours.
The shield has 4 defensive options: stab, blunt, slash and magic. Successfully defending against the correct attack type awards a player with 10 Defence experience and 4 warrior guild tokens. While the shield is equipped, the defensive options interface will appear automatically. The quest, prayer, magic, options, emotes, and music menus will be hidden. The shield can only be equipped on one square and moving off that square will unequip the shield.