Blind Poison

After the initial cast with a succesful hit from a weapon, at the end of a creatures turn (Caster Excluded) who is affected by the attack, or within the area of the attack, is inside the 15ft radius sphere take 2d8 + spell modifier poison damage.

At higher levels: add an additional 1d8 per-level above level 2. 

Beginning at a level 3 Blind Poison spell, a creature(Caster Excluded) who fails a Constituion 20 saving throw is poisoned for 1 minute. Taking 1d6 poison damage at the start of the creatures turn as well as the regular spell damage at the end of the turn.

 Beginning at a level 5 Blind Poison spell, a creature(Caster Excluded) who fails a Constitution 24 saving throw is blinded for 1 minute. If the creature succeeds they do not become blinded.