Fire Skills

Fire Skills is an umbrella term used to describe a number of skills spanning multiple character classes, all of which deal Fire Damage.

Amazon

 * Fire Arrow
 * Exploding Arrow
 * Immolation Arrow

Assassin

 * Fists of Fire
 * Fire Blast
 * Wake of Fire
 * Wake of Inferno

Druid

 * Fire Claws
 * Molten Boulder
 * Fissure
 * Volcano
 * Armageddon
 * Armageddon

Necromancer

 * Fire Golem
 * Corpse Explosion

Paladin

 * Holy Fire

Item modifier
The is a rare modifier appearing on several items, boosting above-mentioned skills:
 * Hellclap, Short War Bow: +1
 * Cathan's Rule, set: set Battle Staff: +1
 * Magefist, Light Gauntlets: +1
 * The Salamander, Battle Staff: +2
 * Hellplague, Long Sword: +2
 * The Rising Sun, Amulet: +2
 * Hexfire, Shamshir: +3
 * Flamebellow, Balrog Blade: +3
 * , staff runeword: +3