Of course, the Yin-Yang Life-Death Forbidden Seal wasn't absolutely invincible. Apart from the Yin-Yang Five Elemental Laws, they couldn't lock down the power of the laws. Besides, they could fight back and forth in the Life-Death Seal. Although Little Black and Little White were absolutely immortal when the Life-Death Seal was activated, they still had to fight and would be heavily injured by the laws that weren't Yin-Yang Five Elemental Laws. Once Little Black and Little White were heavily injured together, it would actually be dangerous. It was equivalent to giving others a chance to kill them at the same time.
However, this ferocious phoenix was obviously not among them. Unless it was a real powerful phoenix that could crush Little Black and Little White with absolute strength, it would definitely lose.
Sure enough, after the power of fire was banned, Little Black whipped the phoenix into pieces after only twenty seconds.
