They can't be affected by fire based direct damage spells (such as firebolt, fire ring and fireball), take half damage from fire-based attacks, and are immune to firebreath effect if they are the second target.
The Fireguard is most likely to learn Combat and Chaos magic and fairly likely to learn the Tactics, Death Magic and Nature Magic skills. Fireguards can not learn Life Magic or Order Magic when leveling up unless some basic training in those skills is already known.
Sorcerers that become a fireguard can be quite dangerous early on, and are a good pairing with Black dragons and the Armageddon spell, as this normally self-destructive spell will do no harm to yourself in this setup.
|Heroes of Might and Magic IV classes|
|Standard hero classes||Knight - Death Knight - Lord - Thief - Archer - Barbarian - Priest - Necromancer - Mage - Sorcerer - Druid|
|Advanced classes||Archmage - Assassin - Bard - Battle mage - Beast lord - Beastmaster - Cardinal - Crusader - Dark Lord - Dark Priest - Demonologist - Enchanter - Field marshal - Fire diviner - Fireguard - General - Guildmaster - Heretic - Illusionist - Lich - Lord commander - Monk - Ninja - Paladin - Prophet - Pyromancer - Ranger - Reaver - Seer - Shadow mage - Summoner - Warden - Warlock - Warlord - Witch king - Wizard - Wizard King|