Harvest Moonglow

You call upon the light of the harvest moon to illuminate a 20-foot-radius Sphere centered on a point within range. The area is bathed in silvery Dim Light. Creatures and objects with the Invisible condition in the light become visible as translucent, shimmering images. When one of your allies is within the light, it can use a Bonus Action to absorb some of the light and gain 2d6 Temporary Hit Points.

Using a Higher-Level Spell Slot. The Temporary Hit Points increase by 1d6 for each spell slot level above 3.