Like all +2 weapons, the DM adds +2 to the AC hit when using this weapon but the damage bonus has already been factored into the damage wheel.
Sonic
On a successful hit with a melee weapon, the wielder deals an additional 1 damage as Sonic.
Runestones are single use items that are turned in to the coach prior to starting an adventure. The effects get added to your overall stats. One runestone may be used per adventure. However, up to two additional Rare/Ultra Rare runestones can be attached to one weapon (or one runestone each on two different weapons) if the player possesses a Runestone Fitting Base (one per additional runestone) and presents it at the beginning of the adventure with the additional R/UR runestone(s) of choice.
Once per room, as a Standard Action, the wearer may belch and deal 2 Sonic damage to every monster in the room.
While wearing these boots, successful 2-handed melee weapon attacks deal +5 damage as Sonic.
All damage-spells (not scrolls or items) cast by the wearer deal +1 damage as Sonic.
When bardsong is in effect, all the wearer’s melee attacks deal +2 damage as Sonic.
Once per game, using this horn as a standard action will cause 3 points of Sonic damage to all monsters in the room.
This item does not work in areas of magical silence.
