Just as a regular healer had assessed, his body was not in serious trouble, nor was it injured or diseased.
However, while observing through a Magic Power perspective, the Hero discovered an abnormal, miasma-like presence lingering around his organs silently and continuously contaminating the Magic Power within him.
This miasma not only caused him to grow increasingly weaker but could also affect those around him. The breath he exhaled carried trace amounts of miasma. Although very faint, prolonged exposure, especially for those who were constantly around him like his sister, would impact both body and spirit negatively over time.
If this miasma had the ability to self-replicate, it could potentially trigger an extremely terrifying epidemic.