Quote Originally Posted by Xerxus View Post
Cold damage.
This sadly doesn't help; the OP is talking about the Tome Of Battle manuvers rather than spellcasting.

To elaborate on the problem, the "Desert Wind" school deals large amounts of fire damage, but offers no alternative energy type or feats that acheive the same. Because manuvers are extraordinary or supernatural abilities, meta-magic and other spell-related feats cannot apply.