Duration of hand of dust?

[LordTobiothan]

I noticed the hand of dust spell doesn't have wording that it lasts until the caster's next magic phase or anything of that sort. Does this mean once augmented it's permanent? Because it reads that way.

 

[John Rainbow]

From what I can see this is still up in the air - I've found a few other threads asking the same thing with no answers as yet.

 

[John Rainbow]

I should add that I think the intent is that it lasts for a single turn.