The Roaringedge was a gift to the bard Tatyana. The legendary sword was entombed with her and guarded by Sir Egren. It sings when pulled from it's scabbard.
Roaringedge is a +1 Dancing screaming burst rapier.
Additionally, when you score a critical hit with Roaringedge, all allies within 60 feet gain a +5 competence bonus on attack and damge until the end of their next turn.
Screaming. Upon command, this weapon begins to vibrate gently, though it emits no actual sound in this mode. Whenever an activated screaming weapon hits, it produces a high-pitched sound and deals an extra 1d4 points of sonic damage to the target. This noise is unpleasant, but it has no adverse effect upon any creatures other than the one struck. The ability of a screaming weapon to deal extra sonic damage is negated in any area of magical silence. Screaming weapons have no additional adverse effect on creatures with unusually acute hearing, although such creatures tend to dislike them.
Projectile weapons bestow this property upon their ammunition.
Screaming Burst. A screaming burst weapon functions as a screaming weapon.
In addition, the weapon explodes with sonic energy on a successful critical hit, dealing extra sonic damage as set out in the table below. (This effect activates even if the target is not normally subject to extra damage from critical hits.) This burst does not harm you or any creature other than the target. This is a continuous effect and requires no activation. Even if the weapon has not been activated to deal extra damage because of the screaming property, the weapon still deals its extra sonic damage on a successful critical hit.
Dancing.As a standard action, a dancing weapon can be loosed to attack on its own. It fights for 4 rounds using the base attack bonus of the one who loosed it and then drops. While dancing, it cannot make attacks of opportunity, and the person who activated it is not considered armed with the weapon. In all other respects, it is considered wielded or attended by the creature for all maneuvers and effects that target items. While dancing, it takes up the same space as the activating character and can attack adjacent foes (weapons with reach can attack opponents up to 10 feet away). The dancing weapon accompanies the person who activated it everywhere, whether she moves by physical or magical means. If the wielder who loosed it has an unoccupied hand, she can grasp it while it is attacking on its own as a free action; when so retrieved the weapon can’t dance (attack on its own) again for 4 rounds.