The truth was that the sudden spurt of pheromones of Tianlong Yun was because he was suddenly hit with the explosion of his bloodline lust, just as he had come out of the comprehension space.
In fact, the moment that he had come out of his comprehension space, and his blood cocoon colors had returned to his body.
Everything had turned to its normal color, or it would be more exact to say that everything had become even more colorful than it already was.
His hair, his horns, his scales, his wings, his skin color, and everything else had regained their color and became even better.
Since the Origin Milk Essence had seen all these things as impurities it had cleaned them out of his body, turning his body just like that of a baby in its mother's womb.
But the moment that the Origin Milk Essence had cleaned all his body from the impurities it had finished its 'job' the meaning of its existence and had disappeared into his body, as extra Qi.