Tainted Moon

You place a powerful illusion over the moon itself, causing its light to channel and hinder magic of certain types. You must be outside, under direct moonlight, and able to use the moon to cast this spell. If you cast this spell again at a different point, any previous castings end.

When you cast the spell, choose a color (other than the moon's current color) and two different schools of magic -- one to be channeled and one to be hindered. For the duration, the moon becomes wrapped in an aura of the chosen color. All creatures that are outdoors, within range, and under the light of the tainted moon have disadvantages on saving throws against the channeled school, and advantage on saving throws against the hindered school. Additionally, spells of the channeled school are always cast as though a spell slot level one-higher was used. While spells of the hindered school can not be cast using a higher level spell slot. A Tainted Moon spell ignores these effects when cast.

If  a Tainted Moon spell already affects the moon and its area overlaps an area your spell would affect, you must make a Charisma saving throw against the spell save DC of the competing spell. If you cast this spell using a higher level spell slot than the competing spell, you automatically succeed this saving throw. On a success, the competing spell ends and your spell takes effect. On a failure, your spell has no effect., and you can not target the moon with this spell again for 24 hours.

At Higher Levels. When you cast this spell using a spell slot of 8th level, the primordial dust material component cost becomes 1000 gp, the radius becomes 100 miles and the duration becomes 7 days. When you cast this spell using a spell slot of 9th level, the primordial dust material component cost becomes 5000 gp, the radius encompasses the entire plane of existence in which you cast the spell, and the duration becomes 30 days.