How to Save for Rage Mode Thunder Strike

A beam of brilliant light lenses from my chest in a five foot wide 60 foot long line. Each creature in the line must succeed on a constitution saving throw or take 2d8 Radiant damage and be blinded until the start of my next turn. I do not see any scenario where that beam does not include at least our go Yeah As I iron man proton blast from my chest Uh, let's see. How'd you do?Uh, which one do I roll d20 Plus your con save and add what to it Constitution 18 plus one 19. Okay uh Which means Is an eight Sorry, I need to find my effects of wild surge  I think actually a tie saves Yes,