Virulent Ward

You surround yourself with an aura of virulence for the duration. Any creature that starts its turn within 10 feet of you must make a Constitution saving throw. On a failed save, the creature takes 2d6 poison damage, or half as much damage on a successful one. Additionally, when a creature within 10 feet of you hits you with an attack, you can use your reaction to force that creature to make the Constitution saving throw, taking 2d6 poison damage on a failed save, or half as much damage on a successful one.

At Higher Levels: When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d6 for each slot level above 2nd.