SRD:Stormbrand

Stormbrand
This +4 thundering shocking burst greatsword allows its wielder to fly at will (as the fly spell). Furthermore, the wielder can move normally (including flying) even in the strongest winds. When the weapon is drawn, the wielder gains electricity resistance 30 and sonic resistance 30.

Caster Level: 21st; Prerequisites: Craft Magic Arms and Armor, Craft Epic Magic Arms and Armor, blindness/ deafness, call lightning or lightning bolt, control winds, fly, protection from energy; Market Price: 235,350 gp; Cost to Create: 117,850 gp + 12,350 XP.