The Glyph of Warding is, basically, "deal elemental damage or cast a pre-determinded offensive spell on anyone activating it". The Psionic version of it works almost the same way, except for the way it is cast. I wasn't sure about two things, through.
First - does the power in the Glyph has to be manifested at the same time and included in the power's cost? (It does really matter, especially in a low-level play)
Second, just to clarify - you can store both offensive powers AND spells or spellike abilities in it, right?