Jiang Fei was not at a disadvantage against the monster. Under his Nephilim form, Jiang Fei's Attack Power more than doubled. When his Ruthless Barrage stacked for the tenth time, his Attack Power exceeded 40,000.
Moreover, under the Nephilim form, Jiang Fei was able to fully ignore his opponent's Defense. Therefore, each attack dealt a significant amount of damage. With the Nephilim King's Eyes, Jiang Fei could even regularly deal Critical Damage to his opponent which resulted in a rapid loss of Health Points for the monster.
Although the monster dealt nearly 10,000 damage to the Juvenile Skygliding Dragon with every single attack, and occasionally even dealt more than 20,000 damage if he used his skills, Jiang Fei could still overcome the threat with his 140% Lifesteal effect.