Item Card: The Siegebreaker
HD file link:

This item is designed to allow the user to fight massive enemies and win. There will later  be a rule-set to explain what the weapon properties it has will do (flamberge and zweihander), but for now it has very powerful features, like being able to halve the damage of a single attack and providing a boost to saving throws and charisma.
The most powerful feature it has is certainly this: for every size modifier larger than you a target is, you gain an additional attack when taking a full attack action against the target. This makes a character more dangerous, the larger an enemy is. Both of these main features only apply if the wielder is of good alignment (sorry neutrals!).
This is a weapon that allows the user to become an inspirational heroic figure, planting themselves firmly between the mighty and the innocent.