Echo Step

You summon an Echo of yourself from yourself that you can command to move. The Echo can not perform any other action, but the Echo can move as fast as your movement. It can move as far as you want and it can stand still for as long as you want. Upon breaking the concentration of the spell, you teleport to the Echo. You can not teleport to the Echo within 6 seconds of it being cast. If you lose concentration over the spell before you are ready to teleport to it, it will cancel the spell and nothing will happen. This echo is visible to all other creatures. The Echo is capable of pathing on its own and taking intelligent routes based on your knowledge. Spells that affect physical appearance, can affect the Echo. When touched, the Echo feels as if it is just a large amount of misty energy gathered in one location.

Example: You are entering a house with your party. You have been to this house before so you know where the bedroom is.  You cast Echo Step at the front door. Your party member casts invisibility on the Echo and you send it to the bedroom. You are able to get your Echo to the bedroom and past all the enemies in the house because it's invisible. You then break concentration and teleport to the Echo and open the window to let the rest of your party in.