Ulixes' Spiteful Stars

You channel starlight into a persistent deterrent. Choose one creature within range. 2 prismatic stars begin swirling around the creature's head. You may use your reaction to expend a star and activate one of the following effects:

•  When the target makes an attack against a creature you can see, the target takes 1d6 force damage.
•  When the target is hit with an attack by a creature you can see, reduce the damage taken by 1d6.

The spell ends once all of the stars have been used or once 1 minute has passed. 

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, add 1 additional star for each slot level above 1st.