The Great Cleric manga volume 6 features story by Broccoli Lion and art by Hiiro Akikaze.

Luciel has reached the thirtieth floor of the underground labyrinth. But when Cattleya sees him thriving despite his dangerous mission, she begins to suspect he may be taking strange drugs…which rings one very smelly bell in Luciel’s mind: Substance X! Will its secrets finally be revealed?!