Barrow bronze is reasonably common by the standards of this lecture, being the metal that the blades of many wights are made of. Of course, obtaining it oftentimes necessitates fighting those wights and so early in the history of the Gold Order barrow bronze was somewhat rare. This changed after the Necrarch War and the Cleansing of Sylvania, after which the College almost had more barrow bronze than it knew what to do with.
Legends claim that the creation process of barrow bronze involved the strange magic of the pre-Imperial tribes that once inhabited the lands that are now the Empire, however the exact forging process remains a mystery. It is known to our Order that barrow bronze is significantly more receptive to enchantments than ordinary bronze, particularly those that derive from
Shyish, the purple wind. Some Magisters have gone so far as to claim that barrow bronze will outright reject enchantments from other winds if it has not already received one from
Shyish, though this is hotly contested by other Magisters of the Order.
The mundane properties of barrow bronze are no less interesting. It is able to maintain an edge for far longer than ordinary bronze, as numerous veterans of the Cleansing of Sylvania can attest. It seems to be partially immune to patination, with most recovered barrow blades not having a scrap of green on them, while those that do possess any green patina having only minor amounts of corrosion. Instead, patination seems to stop at a black or dark brown color.
Unfortunately for our College barrow bronze loses its esoteric qualities upon being removed from the barrow its late wielder was buried in, unless wielded by said wielder or handled with extreme care. As such research into the metal has been met with several setbacks.
Forged millennia ago by the Skytitans during and likely before the Ogre's Big Migration the only known source of skytitan bronze is from the ruins of the skycastles of that ancient race in the Ancient Giant Lands. The creation prossess of skytitan bronze remains a mystery despite the Gold College's best efforts. When gazed upon with mage sight skytitan bronze shows a considerable amount of
Azyr mixed with the expected
Chamon, though it remains debated whether this is a result of the forging process or simply a natural result of sitting high upon a mountain for millennia.
Skytitan bronze appears to be largely immune to patination, with the ironblaster examined by the College still retaining the appearance of bronze cast only a few years ago. Based upon interviews with members of the Ostland School of Gunnery and Engineering, skytitan bronze is believed to have extremely high tensile and yield strength. This is rather unsurprising as many ironblasters have been shown to be able to withstand the incredibly poor maintenance and gunnery skill of their ogre owners. In addition, it is extremely resistant to weathering, with many of the decorations on the ironblaster still clearly discernible despite it having spent nearly five millennia exposed to freeze-thaw cycles and the wind.
Archbronze is rare to find even by the standards of the metals this lecture is about. Perhaps half a dozen items of archbronze have been obtained by the Colleges, ranging from cauldrons to horse bits and even a sword. All of these items share a common artistic design indicating a shared point of origin. Exactly where this point was had been a question that the Order could not answer, and it was widely believed that it would remain unanswered for the indefinite future. However, the recent campaign in Albion, and the sword that Reinhardt Hertwig bore when he returned have provided an answer. The decorations on the archbronze blade in the possession of the Colleges and those on the so-called Tooth of Tlang are almost identical, indicating that the Albish know or knew the secret to its creation. However, attempts to investigate further have been frustrated by the reinvigorated mists that the isle has seemed to vanish into.
Items forged from archbronze are actually composed of many subtly different alloys. For example, the edge of the blade in the possession of the College is crafted from an alloy that maximizes sharpness and minimizes wear, the main body of it is from an alloy that appears to have been designed to minimize bending, while the tang is of an alloy with immense yield strength and the fittings of an alloy that takes on an especially fine polish. In addition, archbronze appears to be entirely immune to corrosion and as strong as dwarf steel for reasons that the Gold Order has yet to determine.
Perhaps the rarest of metals included in this lecture, Cathayan celestial dragon-bronze remains largely an enigma to the Imperial Colleges of Magic. The entirety of our knowledge of celestial dragon-bronze is composed of rumors and traveler's accounts from the Far East, many of which are contradictory. It is claimed that before the reign of Empress Huang and her creation of celestial dragon-steel celestial dragon-bronze was the most prized metal within Grand Cathay. It is said that only a dragon possesses the skill to create celestial dragon-bronze. In the current era celestial dragon-bronze is supposedly largely the domain of the non-reigning dragon dynasties, the Yuan, Han, Shu, and Wei, as the Wu maintain a strict control over access to celestial dragon-steel.
Regarding the properties of celestial dragon-bronze little can be said for certain as no magister of the Colleges of Magic is known to have traveled to Grand Cathay and no item made of celestial dragon-bronze is known to have made it to the Empire. It is said that no ordinary fire can melt celestial dragon-bronze, and many Cathayan folk tales claim that the substance is the bane of unfriendly spirits, which implies that the metal contains enough magic to harm ethereal beings. Blades made from celestial dragon-bronze are said to retain their edges for millennia without needing sharpening and many are said to possess a dark rhomboid pattern on their surface, though accounts differ on whether these serve any purpose or are merely decorative. Celestial dragon-bronze is also said to be wholly immune to corrosion, similar to many other alloys in this lecture.
Shout out to
@Mayto and
@soulcake for providing inspiration for two of these metals. If either of you (or anyone else) want to use/adapt the one original metal for your quests feel free to do so.