Æstercor's Aura Wave

You slash through the air with your hand in an arc, as you do from you fingertips shoots a wave of glowing magical fire. Each creature in a 15-foot cone must make a Wisdom saving throw. A creature takes 2d6 radiant damage on a failed save, or half as much damage on a successful one. On a failed save the creature emits a dim glow that remains present for 1 minute. At the end of each of the creatures turns in may repeat the saving throw.

A creature who failed the save still emits the glow even when invisible.

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.