An illustration of the biblical event, 'The Plague of Darkness - Exodus 10:21-29', made in watercolor style. Capture the essence of the event in a respectful and devotional manner towards Christianity. No text or words should be included in the image. Be mindful to portray the intensity and eeriness of the 'Darkness' along with the depicted characters reacting to the event, in a manner that aligns with Christian ideologies.