Vulnerability Hex

You brand the target with a hand engulfed in cursed flames. As part of the action used to cast the spell, you make a melee attack against one creature within the spell's range, and the target must make a DEX saving throw. on a hit, this spell deals 3d6 necrotic damage to each target hit, and a 1d4 die is rolled to determine the effects:

• If a 1 or 2 is rolled, a shadow hex is placed on the hit creature. This causes them to be unable to see the caster and anything the caster has marked for one minute. The caster can have up to 3 things marked at a time on either objects or willing people. 
• If a 3 or 4 is rolled, a flame hex is applied, adding your proficiency bonus to one damage roll when dealing damage with a fire spell. This effect lasts for one minute.

On a successful save, this spell's damage is halved, the secondary effect is negated and no additional targets can be hit.

When you cast this spell using a spell slot of 3rd level or higher, on a successful hit, one additional hand leaps from the first target to strike another target, dealing full damage and same effects as the first target for each slot above 2nd. No additional strikes can be made if the original target succeeds their DEX save.