Bloom

Number One didn't hesitate to enter his heavenly space after finding out a nearby rock to sit on. He was ready to witness a disaster with the parasite growing and launching itself on his precious herbs but he saw none of that. 

"What is this…?" Number One muttered in disbelief as he took out the lid completely and found a Soul Herb that he has never seen before. It was growing out of the parasite's body and it spat it out as soon as the herb ripened. 

Number One caught the new Soul Herb while gazing at the parasite at the bottom of the cauldron and temporarily paused his thoughts of refining it. He had never seen such a Soul Herb and he didn't have any memory of it with his knowledge of Alchemy. The herb was even glowing red as if it improved in quality as well. 

All of it could only mean one thing: the Parasite grew a new, advanced species after consuming two other Soul Herbs.