Bridgewood's Baleful Blast

A beam of sickly green and black energy lashes out at a creature within range. Make a ranged spell attack against the target. On a hit, the target takes 3d10 necrotic damage. A creature dealt damage by this spell must make a Constitution saving throw. On a failed save, the next time the target makes an attack roll or saving throw the target must roll a d4 and subtract the number rolled from the attack roll or saving throw.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d10 for each slot level above 2nd.