normal energy card pokemon PokeDATA Base Set (Shadowless) What are Special Energy cards?

You can mana sink five into hin at instant speed and make your Thopters grow into size equal to your hand

Why Its Rare : The extremely limited number of these cards makes them a treasure for collectors

Even if you don't have one to hand your opponent has to respect that you might well have one and will likely draw one in enough time

The problem would have been resolved with printing pure Basic Energies, commons, uncommons and likely also rares sheets with the same design as those later used for Unlimited in appropriate quantities taking the existing surplus into account

As long as your commander is in the command zone, its kind of like it's in your hand