The "free energy" bit won't work like that. It's mathematically proven that you can't create energy just so, or it would mean that our very basic understanding of physics is wrong.<br>You'd need energy to open the portals, right? And to keep them open. You'd need energy to teleport something high above the ground. The energy you got back from it would most likely be less than the energy used to create the portals or teleport the object.<br>There is no such thing as perpetual motion machines.