Tarra's Lightshow

You open your palm and let loose a fountain of crackles, shooting lightning at whatever you are targeting. Add your spellcasting modifier to what the caster's spell save DC would normally be, and that is this spell's save DC. On a hit, creatures take 1d8 lightning damage. A metallic object hit by this will be briefly electrified up to 15 feet in every direction, and any creatures touching it take 1d4 lightning damage.

This spell's damage increases by 1d8 +2 when you reach 5th level (2d8 +2), 11th level (3d8 +4), and 17th level (4d8 +6).