Thank you very much! I'm really glad that no one's seen anything horrible in there, yet.

As for fire Resistance/Immunity...
Quote Originally Posted by Lyndworm View Post
Elemental Savant (Ex):
At 5th level, the Mage's ability to wield the elements astounds and frightens even elementals. From this point on, any spell or Spell-Like Ability with the Cold descriptor (if the Mage has an Icy Heart) or the Fire descriptor (if the Mage has a Fiery Soul) cast by the Mage can affect even those normally protected against such effects. Creatures who are usually immune instead take half damage, creatures who take 150% damage instead take 200% damage, and the spells bypass Energy Resistance entirely.

If a spell is affected by both this ability and either Searing Spell or Piercing Cold, the effects are similar but stronger. Creatures who are usually immune instead take full damage (unless you're employing Piercing Cold against a creature with the cold subtype, in which case the spell has no additional effect), creatures who take 150% damage instead take 250% damage, but the spell has no additional affect against those protected by Energy Resistance.
You've pretty much just suggested that I add an ability that the class already gets at 5th level.