Twilight Resonance

As an additional cost to cast this spell, if the caster has not undergone Twilight Embalmment, you must use your bonus action to sacrifice 1 hp of blood.

The touched creature or object gains an aura of 30ft from the touched location.

This aura dispels all darkness and casts a dim light within range. When a shadow creature starts its turn or moves into the light, it automatically take 1 point of damage and must make a CHR save or be blinded.