Basket-hilt Broadsword (3.5e Equipment)
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A sword with a broad, double edged blade, and a thick steel basket over the single handed hilt. The size & shape of the hand guard grants a couple advantages over a more traditional longsword. First, because the whole hand is enveloped by it, it is very difficult to wrest it from someone grip; the wielder gains a +2 bonus on opposed rolls to avoid being disarmed. Also, the thick basket can be used to deflect blows like a buckler, granting a proficient wielder a +1 shield bonus to their AC. Finally, a proficient wielder may use the Weapon Finesse feat to apply their Dexterity modifier instead of their Strength modifier to their attack rolls with a basket-hilt broadsword.
This sword can be wielded by someone with martial weapon proficiency (or proficiency with the longsword or rapier, as the weapon falls somewhere between the two) without penalty, but they do not gain the bonus to their AC, nor can they use the Weapon Finesse feat with it.