Here is the requested translation:
The Frost Giant warlord was bold, but not bold enough to the point of recklessness; such audacity wouldn't have let him live this long.
The Frost Giant warlord wanted to retreat, but it seemed impossible now—the reason being the Red Dragon had him locked in its sights.
The Red Dragon fighting the Silver Dragon; why are you getting involved? The Frost Giant warlord felt like crying, though no tears came.
At the same time, Leon never expected that bullying a "child" would result in a third party intervening.
"I advise you not to act rashly; otherwise, my sword will show no mercy," Leon warned Isily, making it clear that should she insist on escaping, he wouldn't hesitate to use his Sword Control Technique to knock the Silver Dragon out of the sky. Whether she lived or died wouldn't be his concern. He then turned his gaze to the Frost Giant warlord, descending slowly on his White Dragon.