Flaming Sword in Heroes 4

Increases the hero's Melee Attack and Melee Defense by 3. In addition, the hero does 30 hit points of Fire damage plus 3 per level of the hero.

The first to wield these weapons were three fallen knights who rode on the backs of Nightmares and set fire to the countryside as they passed. As the tale goes, they burned half of the civilized land before a powerful wizard stopped them.