Epic Synth Riff

You play a wicked riff on your synthesizer that unleashes lightning in a 45 ft line with a width of 5 ft. All creatures within the area of the spell must succeed on a Dexterity saving throw or take 2d8 lightning damage, or half damage on a successful save. You gain temporary hit points equal to half the damage dealt for 3 rounds.

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