Heroes with Fire Magic as a starting skill:
Heroes with a specialty in Fire Magic:
The following heroes start with Expert Fire Magic:
Bizarrely, the Fire school doesn't have the most damaging spells in the game (except Armageddon obviously), but comes with a few useful utility spells all the same. Curse, Blind and Berserk in particular will wreak havoc against your enemies in short order. Slayer and Frenzy can see some situational use when you have to go all-in against particularly tough enemies.