Bondrake's Spiteful Smite

When you cast this spell, you gain a moment of clarity as though years of hard earned knowledge in exploiting critical weaknesses within any enemy's body, flow into your mind, you temporarily learn how to debilitate your enemies.

As part of casting this spell, you also make a weapon attack. Until the spell ends, On the first hit you make against a target, the target suffers the weapon attack’s normal effects and damage, then the target suffers an additional 4d8 of Force Damage. After a successful hit, this spell ends 

Additionally, as part of the same action but before you hit, you can decide to sacrifice one die from the 4d8 of Force Damage, reducing it to 3d8, to cause the target to make a Constitution saving throw against your spell save DC. On a failed save, the target suffers the Poisoned condition until the end of your next turn.

If the target that was hit by this spell before the end of your next turn, suffers any additional damage, the target will also retake the original Force Damage taken, once before the end of your next turn.

Using a Higher-Level Spell Slot. The damage increases by 1d8 for each spell slot level above 2nd.