CURATOR COMMENT
-Leave the ATK|HP section of the table blank if the card is not a creature (n/a isn't acceptable)
I think we talked about this before in regards to new spell concepts, but at this point, if you're steadfast on this particular rune, then all you need to do is fix that issue above and it'll be good to go.
As weird as it sounds, I initially thought that you would change 'Phase' into a momentum like ability; think of it this way - as the Aether creature can normally bend space to his will in order to become immortal towards objects (i.e. - his body is intangible), I would also assume that an Aether-like being could make himself intangible to get through shields in order to defeat an opponent. Of course, that's just my opinion. ^^;