Twilight Veil

You pull a curtain of darkness and cover the world with a veil of twilight. For the duration, the light of any astral body (sun, stars, moon, etc..) stops reaching the Realm in which you are standing when casting the spell plunging it in a reddish dim light. Any area which was previously considered dim light becomes darkness. The light from other light sources, such as torches or the light cantrip, still functions normally. If a creature attempts to dispel this spell via dispel magic, they take 4d6 necrotic damage and waste their spell slot.

The only way to end this spell is to destroy the pure light gemstone used in the casting.