Also known as: エーテライト
A Mystic Code wielded by Sion Eltnam Atlasia.
While looking similar to String,it consists of an artificial Nervous system with the shape of a nano-scale filament one micron thick that cannot be seen with the naked eye.
Although it's used like a whip by Sion, it is actually designed to attach to the opponent's skin, integrate with their central nervous system, and read their thoughts and memories.