This longsword is a magical weapon that deals lightning damage. When the Arc weapon is attuned, strike the tip on a hard surface as a bonus action. The static friction from the contact will generate an electrical charge which is enhanced by the weapon's enchantment. For 1 minute, every time you strike a creature it must make a constitution saving throw DC 17. On a failed save the creature takes 3d10 lightning damage in addition to the weapon damage and is stunned until the start of your next turn. On a successful save, the creature takes half the damage. Add an additional 1d10 damage for any creature wearing metal armor.
When enchantment is not activated, this weapon functions as a +2 longsword.
Enchantment can be used again after short rest.
Proficiency with a Longsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.
This weapon has the following mastery property. To use this property, you must have a feature that lets you use it.
Sap. If you hit a creature with this weapon, that creature has Disadvantage on its next attack roll before the start of your next turn.
Notes: Damage: Lightning, Stunned, Damage, Combat, Versatile, Sap