Blood Thinner

"You extend your hand toward the creature that's just been struck, thinning their blood, causing it to flow quickly and freely from their wounds."

When a creature in range takes Slashing or Piercing damage, you use your reaction to make their wounds bleed profusely. On a failed Constitution save, the target takes 3d6 points of Necrotic damage as they begin bleeding. On a success, the target instead takes 1d6 Necrotic damage.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage taken when the target fails or succeeds their save increases by 1d6 for each slot level above 1st.