Umberlee's Sting

A long, glowing appendage from the creature used in this spell's casting grows from it and attempts to sting a creature you can see within range. Make a melee spell attack. On a hit, the target takes 2d12 radiant damage and must make a Constitution saving throw. On a failed save, the target is paralyzed for 1 round and poisoned for 2 rounds. On a success, the target is poisoned until the end of its next turn.

This kills the creature used in the spell's casting, unless it is magical in nature.

When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d12 for each slot level above 3rd. Additionally, for each slot above 3rd, the target is poisoned for an additional round on a failed save, up to a maximum of 4.