Sword of Lightning
+2 Mithral Shortsword, light, finesse
Mithral weapons are immune to corrosive effects. They count as Silvered weapons for the purpose of overcoming resistances.
When it strikes a critical hit, this weapon deals an additional 2d6 Lightning damage.
A creature who draws the Lightning Sword can cast Fly without expending a spell slot or material components. This ability functions three times per long rest.
When struck against the Sword of Aaqa as an Action, the two swords generate a 30-ft. line of sonic energy. Creatures in the line must succeed on a DC 18 Dexterity saving throw or suffer 6d6 Force damage. Creatures who succeed on their saving throw take half damage. This ability can be used three times per long rest.
History
This shortsword was wielded by the Wandering Duke Isociol in the battle against the Queen of Chaos in the Age Before Ages.
Significance
A rare relic of the Wind Dukes, forged to fight the forces of destruction. It was used in the War between Law and Chaos, when the world was still being formed, and Chaos threatened to dominate the multiverse.