Tod's Umbral Umbrella

The ash or charcoal is transformed into a dark semi-transparent curtain around the caster, which dims the light by one degree (bright light to dim light, dim light to darkness) for the caster within the curtain. The caster may see through the curtain up to their standard distance, taking into account darkvision, truesight, and/or any other vision status.

Creatures looking at the caster perceive a somewhat blurry and darkened figure. This effect is magnified while the caster is in full darkness, giving them 1/2 cover in the open. The effect does not stack if they are also affected by the Darkness spell. Creatures with truesight are unaffected.

Additionally, any time the caster takes radiant damage, the amount is reduced by 1d8.

The spell may be dismissed with a bonus action.