Bottled Lightning (Patreon)

It used to be capturing lightning was extremely dangerous. Something only foolhardy alchemists did on stormy mountaintops. Thankfully, some have found a far safer method to create these bottled wonders, though the power is only a slither of the real thing.

One issue that always comes up when making items is: what damage / DC is fair? As a common item, I'm imagining this vial to be like a slightly better cantrip. Being one-time use means there's some flexibility in making it special or powerful.

What do you think? is 2d6 fair as a common item? considering the range and a potential number of targets? would you give this to your low-level players?