Sunderpeak Mountains

The  are one of three known, major mountain ranges on the continent of Issylra. Located south of the region of Othanzia and two days' ride on horseback southwest of its major population center of Vasselheim, the steep Sunderpeak range divides the northern region of Othanzia from the lesser-known (and virtually unexplored) regions of Issylra to the south. This mountain range also includes an intensely volcanic region that is home to a rift with the Elemental Plane of Fire.

Notable places

 * The Cindergrove: A petrified, ever-burning forest in the valley caldera atop the Sunderpeak Mountains, where the rift to the Elemental Plane of Fire is located.
 * Pyrah: The Fire Ashari keep a close eye on the rift from their village on the outskirts of the Cindergrove.

Creatures

 * Ettins: two-headed giants

Cartographer Tyriok Gadsworth described the mountains as pretty steep. Vox Machina, traveling to Pyrah, could smell ash and something like burnt cedar even at the base of the mountain range. To the untrained eye the mountains looked like unclimbable, sheer cliffs, but Vex'ahlia spotted very thin, steep switchback paths leading up. The party fought off an attack by ettins on the path, and reached a three-mile-wide, uncomfortably hot caldera coated with jagged obsidian and scattered pools of sulfur-emitting mud. As they made their way toward the Cindergrove within, they encountered the Fire Ashari.

When Keyleth and Allura scried on Pyrah, they discovered it had been destroyed, apparently during Thordak's escape from the Elemental Plane of Fire. Where the Fire Ashari village once stood, there was nothing but sundered wood, charred bodies, and trees flattened by an explosive blast. In the center, there was a large, ominous, flickering gash between the Elemental Plane of Fire and the Material Plane, roughly thirty to forty feet in width and height, as magma poured out of it. Wandering imps, elementals, and various entities peeked out and escaped from the portal into the mountains.