Jiang Fei's entire duration of berserk was not long. It was not that a strong player came around or was it because he suddenly felt sympathy toward the players of Saintlight City. It was the simple fact that when the players had seen Jiang Fei's first strike against the so-called "first wave" of attack, they got scared. Within seconds, everyone changed their mindset from being patriotic to their city to every-man-for-themselves.
Isabella's AoE attack, the Rain of Fire, coupled with the Skygliding Dragon's Searing Breath, displayed a killing speed of destroying tens of thousands of player.