Taldaline's Starshine

You create a burning ball of light floating above your head, which sheds bright light in a 20-foot radius and dim light in an additional 20-foot radius. 

As an action on your following turn, you may pulse the light brighter. Any other creature within 20 feet must make a Constitution Save and if it fails has disadvantage on the next attack they make before the end of your next turn. Creatures that do not rely on sight automatically pass this save.