here, i'll save you and everybody else some scrolling. ;)
Gruaghlothor
Gruaghlothor is the supreme ruler of the ferrous dragons. His power was once equal to that of Bahamut and Tiamat, before they achieved godhood. According to ferrous dragon legends, Gruaghlothor was the first of the ferrous dragons, and was responsible for creating the hierarchy that all ferrous dragons strictly follow. Several powerful red dragons banded together and destroyed Gruaghlothor, but he swore a dying curse to return for vengeance and not rest until all red dragons are destroyed. As a result of this curse, Gruaghlothor was indeed reborn, but not as the same creature. Should the current Gruaghlothor perish, the great wyrm iron dragons meet to choose one from among their ranks to become the new Gruaghlothor. Through a secret ritual that lasts exactly one year, the new Gruaghlothor emerges to lead the ferrous dragons and plot the extermination of red dragons.
Gruaghlothor possesses a constant telepathic link with all ferrous dragons, and thus even the most evil of the species will not defy his will, for he will know instantly.
Here are a few other sidebars that were trimmed:
Other Ferrous Dragons
Ancient lore tells that twelve or more species of ferrous dragon existed before the great wars that nearly destroyed them. Two species were definitely driven to extinction, though none know the fate or current whereabouts of the other five species, not even the other ferrous dragons. The nature of the seven unknown species remains a mystery, but at least one is probably the magnetite (lodestone) dragon.
The Iron Wars
Several millennia past, civil war erupted between the good and evil ferrous dragons. The impetus for this war, now known as the first Iron War, has been lost to history, but rumors suggest that it began with the discovery of a particularly large deposit of iron ore. Regardless of the cause, many losses were suffered by the ferrous dragons, and their empire began its decline.
The second Iron War was initiated by a group of chaotic dragons known collectively as the rock dragons. Rivalry had long existed between the two groups, but open conflict rarely occurred. Sensing the weakened position of the ferrous dragons, the rock dragons moved in for the kill. The second Iron War ended in the near-extinction of both draconic empires. Tiamat sent her chromatic dragons to crush the last remnants of both.
As a result of the centuries-long Iron Wars, Gruaghlothor has very little tolerance for in-fighting between the ferrous dragons. Instead, he prefers that their enmity be channeled towards the chromatic dragons, particularly the reds.
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Treasure
Like other true dragons, ferrous dragons hoard treasure. All varieties have triple standard treasure for their Challenge Rating. Ferrous dragons are particularly fond of coins and metallic items, hoarding them over gems and other non-metallic treasures.
Lore
Characters with ranks in Knowledge (arcana) can learn more about ferrous dragons. When a character makes a successful skill check, the following lore is revealed, including the information from lower DCs.
DC Result
15 This is a ferrous dragon. This result reveals all dragon traits.
20 Ferrous dragons can sense ordinary metals, making it hard to sneak up on one if using metal armor or weapons.
25 The lawful ferrous dragons have a strict hierarchy, with the higher dragons dictating the laws to the lower ones. The hierarchy, from highest to lowest, is iron, chromium, cobalt, tungsten, and nickel.
30 Gruaghlothor, the supreme ruler of all ferrous dragons, maintains a constant telepathic link with all his subjects; should any of them defy his will, he will know instantly.