Arbane's Sword of Agility was an artifact longsword originally crafted by Arbane of Myth Drannor. At least a dozen were forged by Arbane or others before the secret of its manufacture was lost to history.
A +2 longsword of speed, the Sword of Agility granted the wielder the power to cast jump once a day. Furthermore, while the sword was drawn, they enjoyed continuing freedom of movement and were immune to illusion (pattern) spells and effects. Finally, the sword could cast a daylight spell to dispel darkness once a day.