Call Voltage Blades

You call four voltage blades to strike at locations you can see within range.  The blades all strike simultaneously, and can all strike one location or split up to strike multiple locations. Make a ranged spell attack against each target of a blade. On a hit, that target takes 3d10 magical piercing damage plus 3d6 lightning damage.

At Higher Levels. For every 2 spell slot levels above 5th this spell is is cast with, one additional blade is summoned, and summoned blades deal an extra 1d6 lightning damage plus an extra 1d10 piercing damage.