For the time being it is the only copy, unfortunately. And I really don't think it will be released in booster pack. But you can always get a copy of Curse of Anubis from lv25 Odion, which is basically an inferior Etaqua that affects effect monsters only. But it should be helpful enough.
Cant reply to myself so, ignore the comment below, I was dumb
Noob question, the other day I was attacking my opponent and he activated Windstorm of Etaqua
on me. My monster survived until my next main phase but I can't change the battle position of my monster. Is the effect of this card a permanent thing?