Vomit Metal

You point a creature you can see within range, that creature must make a Constitution saving throw as piece of cutting metal come out of its eyes, mouth and ears. On a successful save, that creature take only 15d4 slashing damage. On a failed save, that creature take 20d4 slashing damage, is blinded and take 8d4 necrotic damage at the start of all of its turn. If the targeted creature heal at least 35 hit points in a single turn, it regain sight and the necrotic damages stop.