Originally Posted by
Dimers
The text of the Rune Master feature happens to restate the description of the runic keyword, but the feature is not needed to benefit from the keyword. All that Rune Master does is put you into a rune state. The powers' runic choices function whether or not you are in a rune state, since the keyword is described elsewhere in the same book. (Sorry, couldn't say where, AFB at the moment.)