Not sure if it would be worth it(and I think blizzards are not in ff2 just AOI?) would be a sandstorm type of event. Not sure what it would have to do, could be a immobilizing/defense reducing event for all non Malakim in the squares where it is hitting(non desert dwellers have to hunker down and ride out the sandstorm, while the Malakim who are used to it, are able to predict the lulls and travel in them, perhaps with slowed movement, but still able to move). Would give a Malakim a movement advantage in deserts without resulting to damaging other people traveling through. And if they struck an enemy trapped by a sandstorm, could do a great deal of damage. Again, this doesn't help them want desert, so would need to be in addition to something to make them not change them to plains, but could be a alternative to the above damage ideas.