| Category | Rivers |
| Continent | Brucrumus |
| Region | Cinazan, Ice Cap |
| Map | Tulerran River |
Tulerran originates from the southwestern extremity of a colossal glacial region known as the Ice Cap. The glacial melt of Arbhun gives rise to the source of this river. In the Aettein region, the river exhibits a captivating azure hue, a product of the ubiquitous magical blue ice across the Ice Cap domain.
The Tulerran is a chilly, fast-flowing river that varies in width from several hundred feet to one mile. It is one of the principal tributary rivers emptying into the Core Sea. The Tulerran runs in close proximity to Eldorien, though while the Tulerran flows southward into the Core Sea, its counterpart flows northward towards Nautrek.
The glaciers of Ice Cap originate far to the east near the Cube of Arcane. Since their initial formation, they have steadily expanded westward. As they encroach upon the temperate lands of Cinazan and Aettein, the fringes of the glaciers melt. One of the rivers draining this region has a unique flow - the Tulerran. It flows south from Arbhun, eventually reaching the Core Sea. Here, the currents of this inland sea pull eastward and northward. Some of the azure waters make their way to the eastern exit, marking the start of the great river Avalninâth, while the majority is drawn northward, giving rise to the Eldorien and its journey to Nautrek.
Ghan-Labad, a renowned geologist from the Nariedan Institute, proposed the "Cap Flow Theory" to explain the geological phenomena observed in the region
The springtime thaw of the Ice Cap's glaciers is referred to as the Ice Cap Melt. This phenomenon precipitates the inundation of the Tulerran.