As long as Unown [Z] is Benched, you pay no Energy cost to retreat a Pokémon with Unown in its name.
You may have up to 4 Basic Pokémon cards in your deck with Unown in their names.
![Unown [Z] (Neo Destiny 60/105)](https://static.tcgcollector.com/content/images/20/2e/2c/202e2c7328e2836870cc31b3e38824452c97fb0c6a852751850f3341317cc303.jpg)
