Expanded Knowledge, a feat from Psionics Unleashed and Ultimate Psionics (I'm using the latter), provides a list of powers to select from. The problem? The power I'm looking for isn't in the list. This feat can select powers not normally available to the character's class - the only limitation is that you have to have a manifester level of at least 3, and that the selected power is at least one level lower than your maximum power level. The character in question has 1st, 2nd, and 3rd level powers, so selecting a 1st level power - Astral Construct, normally only allowed to Shaper Psions, in this case - should work just fine. But it isn't in the list.