Lightning Shadow (電影 Den'ei, literally means "Virtual") is a keyword ability that was introduced in Booster 32: Code:Dreamworld - Dreamclad "Idealize". It is associated with the "Shaddow".
This ability essentially allow a player to "exchange" one of their Reboot State Z/X on Square with a Z/X that possessed Lightning Shadow in their hand during their own turn, as long as the Cost of the returned Z/X is equal to or greater than the number inscribed in the Lightning Shadow ability. In doing so, that player is unable to play another Lightning Shadow ability during that turn.
The current reminder text of Lightning Shadow ability is shown below:
For the list of all cards with Lightning Shadow ability, see Category:Lightning Shadow.