Volant (3.5e Equipment)
From D&D Wiki
A Volant weapon functions like one with the speed effect, except as noted below:
Volant weapons confer two extra attacks instead of one, though the second attack is at a -10 penalty to hit.
Volant Weapons are nigh impossible to follow, and thus the target of such a weapon loses any insight bonus to AC, excluding those confered by temporary magical effects.
The user of a Volant Weapon has their range of movement increased by 5'