Found in a chest on one of the lava trails in the Iron Keep, past the second bonfire. As the item is in a chest which takes time to open, which in itself is fairly far from safe land, very high fire resistance is necessary to retrieve the pyromancy and survive. The pots near a nearby Mimic can be broken to release water and temporarily give the player increased fire resistance; Flash Sweat, Small Orange Burrs, Great Magic Barrier, and appropriate armor can help too.
Another reliable way of accessing the same resistance buff provided by water is to use a Pharros' Lockstone on one of the contraptions in the area to get a huge fire resistant boost.
Also consider chugging an Estus Flask before opening the chest, as the animation is lengthy.
Similarly to its cousin from Dark Souls, Chaos Storm is essentially a more powerful version of Firestorm, creating numerous pillars of fire around the caster. Casting Chaos Storm also leaves behind many short-lived pools of lava, which damage any enemy that steps in them.
Like all other spells, the amount of casts per slot increases upon reaching certain Attunement milestones:
|Attunement Level||Amount of Casts|
| Acid Surge • Chaos Storm • Combustion • Dance of Fire • Fire Orb • Fire Tempest • Fire Whip • Fireball|
Fire Snake • Firestorm • Flame Swathe • Flame Weapon • Flash Sweat • Forbidden Sun • Great Chaos Fireball
Great Combustion • Great Fireball • Immolation • Iron Flesh • Lingering Flame • Outcry • Poison Mist • Toxic Mist • Warmth