Guard Master Zedim stood in front of the giant dragon, and started summoning the greatest, offensive ability to his disposal; White Flames!
White Flames wasn't only a formal name of a greater ability, it was a very literal description. Fire was its hottest when it was white, this was a well known fact, purely because any mage who could shoot fireballs, wished that they could summon white fire some day as well! It was the supreme amongst supremes, and almost no creature could withstand it, especially since it wasn't a mere fireball, but rather a coating of fire instead.
Zedim didn't want to use this ability unless it was his last choice, and considering the couple of counter attacks that Iron Claw the Wicked launched against his platoon, this might as well be his last choice. If the dragon attacked again, the battle would be lost, regardless of how they had the upper hand right now.