A vibration pulsed from the feet of Lancelot before the surrounding Ether was devoured into his body, the earth trembling before his dark transformation, with even Excalibur's golden light being eaten.
This caused Arthur's face to show a change, now more serious as he tried to attack, but a powerful storm of pure Ether blew him back to the edge, his feet dragging through the stone floor with deep ditches on either side.
As his body transformed, the twin demons became a strange ethereal stream of particles, one blue and the other black. His body grew slightly taller, with a strange flame swirling around his feet as he absorbed Ether more and more.
His eyes began to glow a brilliant silver before the small pupil split apart, forming a slit along the middle and spreading apart to become a cross with four stars forming in the gaps.
Like an elegant dancer on a frozen lake—blood started swirling from a small cut on his right wrist.