Bloodburst

You target a creature you can see within range, their blood bursts from their body damaging everyone nearby. The targeted creature and each creature in a 20-foot-radius sphere centered on the original target must make a Constitution saving throw. Taking 8d6 Necrotic damage on a failed save, or half as much damage on a successful one.

The blood spreads around corners. 

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.