As astral construct, except as noted here.
This power creates one 1st-level astral construct of solidified ectoplasm that attacks your enemies. It appears where you designate and acts immediately, on your turn. It attacks your opponents to the best of its ability. As a free action, you can mentally direct it not to attack, to attack particular enemies, or to perform other actions. The astral construct acts normally on the last round of the power's duration and dissipates at the end of its turn.
Astral constructs are not summoned; they are created on the plane you inhabit (using ectoplasm drawn from the Astral Plane). Thus, they are not subject to effects that hedge out or otherwise affect outsiders; they are constructs, not outsiders.
You can have only one astral construct shaped at any one time. If you shape another astral construct, any previous construct dissipates. (The exception is if you are a 5th-level ectopic adept, which gives you the ability to create another astral construct while you have one active.)