Alter Moon Phase

4th-level illusion (druid, sorcerer, wizard)

Casting Time: 1 action

Range: Self (1-mile radius)

Components: V, S, M (a pinch of moondust)

Duration: Concentration, up to 1 hour

You change the apparent moon phase for a 1-mile radius around you for the duration. If a creature within the affected area possesses abilities dependent on a particular moon phase, or change shape based on the moon phase, it must make a Wisdom saving throw to avoid being affected by this spell.

If you cast this spell at night, the altered moon phase can affect light.

If you change the moon phase to full moon, light improves to dim light in the area. If you change the moon phase to anything other than full moon, light decreases to (or remains at) darkness. If you change the moon phase during the day, it has no appreciable effect on light.