The Blood Flame Poison that Su Yu was afflicted with was fed to him bit by bit by his mother at his birth, and its toxicity had lasted for a long time. Yun Feng, born into the Yun Family, a thousand-year medical lineage, was extraordinarily gifted in medicine and poison from a young age.
Su Yu's aunt from the Yun Family took care of him during his time at the sect, allowing him to survive and suppress the toxin within his body. Since Su Yu was, after all, a member of the Nanyao Country's Imperial Family, he couldn't stay at the sect indefinitely, so she sent her nephew Yun Feng to attend to Su Yu. Yun Feng stayed by Su Yu's side for thirteen years, understanding more than anyone how difficult it was to cure his poison.
He had nearly exhausted all his efforts for this, but never expected such a miraculous turn of events to occur at this moment.
