Phasing (This phases in or out before you untap during each of your untap steps. While it's phased out, it's treated as though it doesn't exist.) Creatures with flying can't attack or block, and their activated abilities with in their costs can't be activated.
Wind will win, whatever we wish.
Official Rulings for Katabatic Winds
7/1/2013 : Activated abilities contain a colon. They're generally written "[Cost]: [Effect]." Some keywords are activated abilities; they have colons in their reminder text.
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