Storm Hammer

Sparks of crackling electricity arc from this +1 magic warhammer, and the head thrums with distant thunder. Any hit with this hammer deals 1 electricity damage. You can use a special action while holding the hammer to transform the sparks into lightning bolts.

Electrify [A] (concentrate) Until the end of your turn, the hammer deals 1d6 electricity damage instead of just 1. After you use this action, you can't use it again for 10 minutes.