Arcing Blade

Available to Tempest Cleric, Magus, Sorcerer, Wizard, Warlock

3 rd-level transmutation
 * Casting Time:  1 bonus action
 * Range:  Touch
 * Components:  V, M (a held weapon)
 * Duration:  Concentration, up to 1 minute

Channeling arcane might, your weapon glows with magic power, and releases sparks and when swung. For the duration of this spell your reach increases by 5 feet, you deal an additional 1d8 lightning damage with weapon attacks, and whenever you make a melee weapon attack, another creature within 10ft of the target takes 1d8 lightning damage.