The Consuming Plague by Jestloo
Based out of Ep.29 when Sherwood rolled a double crit-fail and his shadow sword exploded, infecting him with the blackening disease that, to this date, there has not been a known cure for.
I greatly appreciate Mike's (Sherwood) roleplaying ability. The gang's prisoners were escaping and beginning to attack, when Sherwood had the accident. Instead of putting it off for later and helping his team fight the bad guys, Mike played out Sherwood's reaction and wasted several turns of combat panicking.
Anyway, with Ep.92 out, it seems like the disease may be finally catching up with him... (Symptoms include, blackening of body parts infected that slowly spreads from origin. Slow mental deterioration that eventually causes hallucinations and violent behavior. Results in death.)
Ironically, the reason Sherwood left his home in the Evergrove was to find a cure for the black, sludge disease before it spread out of control. It's unnatural and demonic by nature. Being a Druid, Sherwood is all about nature. However, he dabbled with dark, unnatural forces when he took a shadow sword from a demonic enemy, and tamed the shadow bear version of himself. After his sword exploded and shadow bear "Greg" dissipated, Sherwood swore himself away from all dark/evil and unnatural forces. This caused a major rift in the group, when Akio revealed that he was a necromancer by reanimating a corps.