Ancient History
It's believed that the ancient
Hysilens' may have used Dimension Magic in their time, but even this is hard to say - the relation between several gateway ruins and Dimension Magic suggest something of a link, but would imply that the Hysilens had a magical bloodline for Dimension Magic, making them the only species with such a thing.
There are many holes with the theory in the eyes of many - as it was believed that the Hysilens' possess race-wide
Fire Magic and
Summoning Magic bloodlines, and to also possess a Dimension Magic bloodline would potentially make them the only race to have triple or greater bloodlines. It's of course, also possible that the fox-folk had other methods to learn the magic types.
Early History
As a result of this, there
is no history of Dimension Magic prior to the
Shard Ritual, with the first dimension shards being found in the Drakona Empire in relatively recent history - a few hundred years following the Great Demonic War. Generally speaking, the techniques have since been studied quite in-depth, albeit to little in the way of qualitative results.
Modern History
Nowadays, few places are more synonymous with Dimension Magic than the Drakona Empire, where the first shards were found, but the famed Conclave of the Eight - a collection of the 8 greatest spellcasters in the world - act as a neutral party that provides Teleportation Nexuses between the major cities of the regions they reside in, albeit at a cost. Even still, the uptake of dimension magic has been... slow, at best.
All in all, dimension magic is still in its infancy within the world, as it has yet to really mature.
Dimension Shards
Natural proficiency in dimension magic is unheard of; at best,
maybe the
Hysilens' knew of it naturally, but nobody knows for sure. All of those with a talent for the craft learned that talent through Dimension Shards, and these shards are - as a result - among the most coveted of all Crysium Shards.
They're so coveted, in fact, that general knowledge on where the dimension shards can be found is a precious matter indeed; it's believed that the shards are purported to be more plentiful beyond the Primeval Mists as a result of the arcane disasters that were said to have taken place there, but in the old world and in Subterra, it's extremely rare, with the only known location being The Priory in Khalorn, and Votura in Drakona.