You bend at the waist with your arms tucked around your core building a surge of energy. As you quickly straighten up and fling open your arms, a sphere of light emanates from your core.

Each creature of your choice that you can see within a 5-foot radius sphere centered on you must make a Constitution saving throw. A creature takes 3d6 radiant damaged and is blinded until the start of your next turn. On a successful save, the creature takes half damage, but suffers no other effect. 

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