Before the Gates
The time of the Hysilens saw quite an intense study of time magic, engaging with its powers and learning its limitations as a means to amplify the already-impressive abilities of the fox-folk. It didn't take the Hysilens long to uncover the foundational upper limits of time magic - that being its exponential
Aether costs and its inability to reverse time - but that didn't stop them from exploring it to its fullest.
Indeed, in many ways it can be seen that unlike many other traditions of magic, the Hysilens really
did effectively push time magic to its limits, with no real developments made since their time that fundamentally revolutionised the theories and practices of chronomancy; the techniques and ideas of the Hysilens are still in use today.
Early History
As a direct result of this, the only real discoveries that took place during early history involved more spells and such techniques that could further time magic's reach and capabilities, but many of these forays were severely hampered by the Terran government of the time, which began to crack down on
Chronomancers following a catastrophic time travel engine - the Spark Drive - experiment by the official Chronomancy Guild that saw the test craft - a guild vessel identified as the
C.S. Yurihama - crash during the time travel test within the city of Reno, causing a catastrophic arcane anomaly that engulfed the craft and city alike, and threatened to expand continuously. The Terran Navy's only recourse was to glass the surrounding region with anti-magical weaponry to prevent the continuous spread of the anomaly.
Indeed, this event is known as the Sparking of Reno, and is one of many events responsible for the Terran Empire's crackdown on magic in this era - and is yet still responsible for Earth's modern distrust, but begrudging acceptance of spellcasting today - and as the direct form of magic responsible for the Sparking, the Terran Empire's crackdown on Time Magic was among the most stringent in the cluster at the time.
It was so extreme that when the
Shard Ritual was discovered, the Terran government explicitly forbade its use with Temporal Shards to create new
Chronomancers, generally leading to the few Chronomancers of the era laying low or seeking refuge in nations and regions less antagonistic towards magic and chronomancy.
Modern History
Nowadays, time magic's position is fairly secure academically, as the cluster's myriad nations understand its power and allow its training across their space. Even Earth, for all its leery attitudes and posturing,
does allow
Chronomancers to reside and train their kin in Terran space, with the only significant restriction being that no spellcaster is permitted on Earth without explicit approval from the government, and that in general a spellcaster living in Terran space is recorded to a Terran database for surveillance.
Even still, the uncertain times regarding the Terran-Elaiennan cold war are threatening to jeopardize the tenuous stability that Chronomancers have afforded for themselves.
Temporal Shards
Temporal Shards are a very strange case indeed, with conditions that share almost no similarities between the cluster at large and Aldrin specifically. In the cluster itself, temporal clusters are generally fraught with danger to harvest, being located close to natural celestial dangers and cosmological features, with famous deposits being found around black holes and neutron stars.
A few specific areas are replete with them, however; Earth's Sierra Nevada and the site that Reno used to be located in is home to truly incredible growths of temporal shards, so grand that the Terran Navy has to be brought in every few years to keep the shards in check, the latent temporal energies of the Sparking causing the shards to be near-ubiquitous there, but incredibly difficult to harvest safely.
Many Vekh hives also cultivate temporal shards, and the Vekh bioships themselves are all well-known to be comprised of a small number of them, which they use as part of their combat tactics.
On Aldrin, the stories of the temporal shards is far... murkier. The shards don't naturally occur anywhere on the planet, but are replete in the currently-undiscovered region of The Great Empty. Indeed, they've very much overrun the region and made it a treasure trove of arcane knowledge, but one that cannot ever be inhabited due to the replete shards of magic.
The regions surrounding The Great Empty have a few limited outcrops of the shards, but even these see few harvests, owing to the current depopulated state of Aelnar.