Chaos is a gameplay mechanic in Dark Souls.
The following is a list of weapons that are innately imbued with the Chaos mechanic.
The following is a list of weapons that were created by chaos demons but do not have the Chaos mechanic.
Chaos pyromancies leave behind pools of lava in the wake of casting, dealing 33% of the initial damage.
In the Age of Ancients, the Witch of Izalith and her Daughters of Chaos wove great and powerful firestorms. At the time, the Witch and her followers were powerful flame sorcerers who lived in the city of Izalith. Blacksmiths of the ancient city crafted powerful weapons using Chaos arts. Thus, during the earliest known ages of the world, Chaos developed its reputation as a powerful force.
Eventually, the Witch of Izalith attempted to duplicate the First Flame. What she instead produced was a twisted being of chaotic fire: the Bed of Chaos, source of all demons. Several of the Witch's daughters were transformed into chaos demons, and her son became the monstrous Ceaseless Discharge.