Chen Xuan had a bloodline refiner that could purify the bloodline of magical beasts.
The purity of the commander bloodline met the requirements, and the Wind Wolfhound evolved into a Black Flame Hound.
The purity of the Lord-tier bloodline met the requirements, and the Black Flame Hound evolved into a Black Flame Divine Hound.
Beast King Bloodline Purity met the requirements. Black Flame Hound evolved into Black Prison Flame Hound.
The purity of the Emperor bloodline met the requirements, and the Black Prison Flame Hound evolved into a Three-Headed Hell Flame Hound.
Like Phoenix, Fire Phoenix Bird, Flaming Flying Phoenix, Flaming Red Phoenix, Flaming Golden-Winged Fire Phoenix, Divine Flaming Golden-Winged Fire Phoenix, and Seven-Colored Divine Flaming Phoenix.
An unremarkable magical beast bloodline might also hide a powerful ancestral bloodline.
Chen Xuan could discover their excellence and refine their bloodline.