| Category | Depressions |
| Continent | Karterus |
| Region | Ma'Ohari |
| Owner | Raxcvillibus Dumu-loc |
| Created | 15 Artifice 2612 LE |
| Map | Tha'lith |
Toth Coeus is an unnatural canyon in the southern part of Tha'lith. It the result of fanatics of Coeus using a tome designed for opening rifts. On 15 Artifice 2612 LE, with the goal of bringing their god Coeus to their aid, they read from the Irata Phelgas.
At the time of this landmark-making reading, these fanatics and many others were under the whip and hoof of Varelay, a demon empire. Emperor Aperoq, one step ahead of the insurrectionist, put in play a counter-measure. When Coeus came through the rift, they fired a sphere of arcane into it, resulting in a tremendous explosion. For a mile in every direction, nearly everything died. Coeus was half-way through when the rift came down. He was thrown back to his world with serious injuries. Back on Bal-Kriav, in the jungles of Kazzatar the collapsing rift left a deep smoking canyon. Aperoq named this new feature, Toth Coeus, meaning "maw or mouth, of Coeus".
Toth Coeus continuously emits reddish hued smoke. Legends say that this unusual color for smoke, is a taint left from Coeus being injured when the gate was brought down on him. The canyon is a jagged area surrounding by miles of broken ground and rubble. It is rich with platinum and gemstones. The difficulty in scaling its unnaturally oily walls and the beasts lurking in the depths have kept the place from being exploited. The perfume Toth Musk is produced from the oil seepage in the canyon's walls. This perfume is widely sought after for its smell and difficulty in procuring.
As a result of its closeness, the builders of the fortress Tas'dvr Mout quarried stone from this canyon. This stone is called Toth Rock. It gives Tas'dvr Mout's foreboding walls and towers an oily and smoky appearance just like the canyon.