Sword World SFC Comic: Shikkoku no Curse

In the town of Pada on the continent of Alecrast a mysterious addictive drug known as "Devil's Breath" is causing people to behave erratic and eventually die. A band of adventurers, including warrior Bart, the young sorcerer Rizan, the elf Silarm and the grassrunner Plum investigate what is behind Devils Breath. As they follow several leads through the town they stumble upon a party led by a female thief called Nightshade and a cult who follow the god Mireef.

(Source: Record of Lodoss War Wiki)