Arcing Lightning

You summon forth a bolt of lighting, and shoot it towards a creature within range. On a hit that creature takes 2d8 lightning damage, and you can then arc the lightning towards a secondary creature within 30 ft. of the original target. The secondary target must make a Dexterity saving throw or take 2d8 lightning damage.

At Higher Levels. When you cast this spell using a spell slot of 2nd or higher level, the damage increases by 1d8 for each slot level above 1st.