as a constitution attack action, you fire a hitscan electric laser at one target within 40 feet of you, this attack deals 3d6 electric damage on a hit and any conductive target within 15 feet of that first target must make a con save with a dc of 10+your con modifier, if those targets fail, they will take 2d6 electric damage and all creatures within 15 feet of those secondary targets must make a con save with a dc of 8+your con modifier, if those tertiary creatures fail, they take 1d8 electric damage