Wildfire
From Warhammer 40k - Lexicanum
Wildfire is an unholy narcotic used by the Scorched Creed chaos cult on the world of Redemption. The narcotic is a black crystal, formed in the magma-drenched base of the spires of the Koronatus Ring, where only the damned would venture. When chewed, the crystal combusts and triggers a paroxysm of fury, along with a brief surge of strength and speed. Anything but a smallest dose is lethal to its users, but it is a price the scorchers of the creed pay willingly for a few minutes of divine slaughter. Under Wildfire's influence the users breathe out scalding oily smoke which can spread the effects of the Wildfire to others around them.[1]
