The battle of Underwood was particularly savage on the High Elves; they were delicious prey to the Alhoons, and in the battle and its aftermath, the majority were killed. The horrors of the remainder of the war kept them from recovering, though at least that meant they weren't caught when the Archmage's action destroyed Gnoll-type magic. They did, at least, have their archived lore to fall back on, as the Elf Queen preserved their libraries in what was to become Concord. To-be-Concord itself was caught flat-footed, in a way, by the end of the war; after being built and used as the foundries for the Empire/Elf/Dwarf alliance, war's ending left it without purpose. The Elf Queen used its reconstruction into the fabled 'city of amity' as a spur to recovery, giving all three Shards something to work on together with the dwarves, founding what was eventually to become the economic engine that drove the Elves' recovery. But that was not to come to fulfillment until the next Age.
A new custom arose among the High Elves. Every day, at the start of the evening meal, the diners sprinkle a bit of ash onto their plates, then ritually clean it off, signifying the work that needed to be done to reclaim their race - but also that from desolation can come the beauty of the High Elves, signified by their fine porcelain dishes. In later years, this custom dwindled some, from an everyday occurence to just special/eventful meals. But it still remains, and is honored.
The Growing-Shaper was something that no one could claim to have discovered, or invented, and yet it was too useful to ignore on that basis. In shape, one was disquieting, looking like nothing less than a mushroom grown horribly wrong; yet inside, it held a chamber where seeds could be placed. By focusing psionic energy on the Shaper, a Shadow Elf could mutate seeds into a form they liked. Such seeds were often the only things that could grow in blasted lands, and to all appearances they looked like normal - even extra-ordinarily healthy - plants. The Wood Elves were grateful for the plants that could restore their green lands and forests. Yet there was always the uncertainty, of just what might be lurking within the plants, given their strange origin.
The Wood Elves tried to regrow their forests and fields. The pine, ever a provider of friendly cover, in all season and all weathers. The common crabgrass, for ground cover is essential to prevent all from being washed away. And wheat, as one of the most flexible and prolific food plants. They were saddened by the lack of diversity, the mundane nature of their forests, and the lack of their formerly wondrous vegetation; but that must be saved for a time when the race is stronger, and could turn away from survival to bring back joy and wonder. It was at the time that they developed ways to create the famous Elven Waybread, used for travelling long distances, needed in forests which often lacked food.
In retrospect, the seeds for what happened in this age were sowed during the 8th Age. Wizards had gotten drunk on power, which they now lacked. The Red College had gone too far in its desperation and used rather than bound demons. And the High Elves, who among the wizards had always been the voices of restraint and caution, well, they were no longer present in the halls of magic to keep the younger, brasher races in check. And another gnome had become Archmage, which never seems to end well.
How deep had the rot gone in the Red College? Deep. How long had the Diabolist done her work, or was she even aware of it? Nobody really knows. The Witch Hunters nearly found out too late, and then it was a desperate race, messengers going out to all the great powers of good and evil, a brigade of their hardest, most dangerous execution agents riding for Bald Mountain as fast as their steeds could go.
They interrupted the ritual, but it had already started. As the earth broke, help arrived; the Emperor, General Lead, the High Druid, many others. Finally in the end came the Three and the Great Gold Wyrm, flying in formation as they rained death down upon the fallen magi below. But in the end, only one thing saved the world; the Great Gold Wyrm physically blocked the chasm to the Abyss with its own body. Afterwards, the Red College was purged, and reformed almost from scratch. It was put strictly under the control of a Triumvirate of Emperor, the Grand Master of the Witch Hunters, and the Archmage, and its numbers limited and strictly regulated.
Many wizards of the day spent time trying to either seal the hell-rifts, or fight what emerged from them. The Witch Hunters emerged as heroes, saviors, and their glory brought with it power, funding, and gifted recruits.
A hero wizard of the battle at Bald Mountain is still remembered today. Meryl, posthumously known as 'the Stainless', was perhaps the only senior member of the Red College who was not a part of the conspiracy, and played a key role in helping the Witch Hunters uncover it. Her bindings and counterspells and demon-abjurations were vital to the early stages of the battle, when it was just a band of elite Witch Hunters against an entire college of demon-summoner wizards, and without her they would have been overwhelmed before aid arrived. She died of the many wound sustained before clerical healing could reach her. She is remembered today largely because the Witch Hunters were grateful and the wizards REALLY needed someone that day they could feel good about.
The gnome Archmage continued on because they hadn't actually been a part of the conspiracy, just too lax in supervision. People blamed them for it anyway as it was their wizards and anyway, gnome. The Archmage tried to get the White College to take a larger role, which they did happily, and started a program where many members of the Black College took holy orders, to become battle mage-priests. This was less popular, but some went on to celebrated careers. Regardless, suspicion of wizards jumped through the roof, and once again in the countryside people were likely to burn you as soon as look at you if you didn't wear a white robe. Also about this time the idea of nipples and needles as a test for 'demon witches' grew in rural folks minds. To this day wizards fumes and make scathing remarks about this.
In the Ninth Age, lycanthropes were a serious, though not overwhelming problem. The Silver Cleric watched over the Southern Empire, battling lycanthropes. The Archmage, however, viewed it as someone else's problem, but when they did assist, it was usually either through Blue Wizards forging magical silver weapons, White Wizards providing wards against shapeshifters and working to improve village dwellings and defenses, and Black Wizards going 'Why use silver when I can hurl fireballs at you'. In general wizards tended to be wary of them, as the legend of the Ebon Magewolf made clear that even a wizard who was pure at heart and said his cantrips by night, could become a WOLF if a lycanthrope bit him, and the moon was full and bright.
Imperial foodways had to change with the routes to other lands now either closed or very hard to use. A series of fads swept the Empire.
In the final years of the age, a plan long set but previously unsuspected took place. The leader of the Fire Giants, Dragan Stronghammer had united the giants of the North for the first time in thousands of years. He then marched south against the Empire. With both wizards and Elves damaged, the war went poorly, though it was the western Empire who suffered the most. The magical stresses of the war led to the first hellholes opening, which plagued both sides. The Witch Hunters, who had already had to step up their game after Bald Mountain now really had to do so, helping to lead to their tenth age peak.
The Death of the Emperor came when traitors stole the necessary reagents and the Golden Carapace could not be deployed. Dragan was cunning and his spies turned out to be everywhere. Similar betrayal also led to disaster at Horizon.
The Silver Cleric, however, crowned a new Emperor at Santa Cora and new forces rallied to face the Giants and their humanoid hordes near the southern shore of the Midland Sea. Fearing the Giant would attack the Abyss and try to let in the Demons, the Great Gold Wyrm's Paladins charged into the fray and the new Emperor rode a golden dragon into battle. And with him rode a hundred knights on dragonback. Dragan's death led to the breakup of his horde and now the Imperial Hand and the Witchhunters and the Silver Cleric all hunted for traitors in the Imperial Government, though the Silver Cleric was mainly looking for lycanthropes.
Demetrius I married his Gold Dragon ally, who took the name Hermia I, and founded the line of Dragon Emperors, who were human but with some of the power of Dragons in their veins.
And the battle seems to have led to the rise of many cults, demons or otherwise, from the dark energies unleashed by Dragan's army and the final battle too close to the Abyss.