The titular electricity of Nightmare is his power to show up in desires, both before the victim experienced encountered him from the flesh in the kind of unwell omen or while in the minds of survivors after a terrifying assault. He can change for the astral and ethereal planes. https://socialfactories.com/story5280665/the-smart-trick-of-nightmare-mu-online-season-20-that-no-one-is-discussing