Elemental Plane of Fire

The Elemental Plane of Fire is one of many Planes of Existence in the Critical Role universe. It is connected to Exandria in the Material Plane with at least a few rifts, the best-known of which has been tended by the Ashari for centuries.

Description
The Plane is an endless badland of broken, burning land and reddish, iron-like rock, flaming distant mountains, and a burning orange-and-red horizon. Tornadoes of flame tear through the landscape, and glass-like rock juts out from beneath the ground in dangerous but beautiful jagged gardens of melted sand. Black clouds of smoke and ash rise from multiple volcanoes, carrying a sulfuric and ionized scent. The temperature is extremely hot.

Creatures alien to the fire elemental climate, averaging between 110°F to 120°F, suffer progressive exhaustion.

Notable locations

 * The City of Brass: A large settlement, populated primarily by those who are native to the Plane, although humanoids from the Material Plane are not an uncommon occurrence. However, the city has a very prominent slave trade and those humanoids often end up becoming enslaved.
 * The Sea of Fire: A sea of molten rock and there are aqueducts channeling the lava from the sea through the City of Brass. The City of Brass also has naval grounds on the coast of the Sea of Fire.
 * Planerider Ryn's study: A dimly-lit cavern of volcanic porous rock used by Planerider Ryn as a study or library. Several lanterns hang on black chains attached to the ceiling and a stream of molten rock flows through the center of the chamber. The furniture of tables, chairs sits closer to the its edges. It is guarded by a fire elemental conjured by Ryn.

Connections to the Material Plane

 * Pyrah: In the region of Othanzia, there is a portal called the "Rift of Flame" that connects the Material Plane to the Elemental Plane of Fire. Long ago, the druids of the Fire Ashari established an enclave of Pyrah around the portal to guard it maintaining an elemental balance and protect the world from energies and elementals of the Fire Plane.
 * The Cavern of Axiom: In Kamaljiori's chamber in the Cavern of Axiom, there are multiple gateways to Elemental Planes. Keyleth placed her hand into the column of flame marking the gateway to the Elemental Plane of Fire, then Wildshaped into a fire elemental and plunged in.
 * River Inferno: Some speculate that it has ties to the Elemental Plane of Fire.

Unguarded rifts

 * Everplume: Experts believe that in the center of the Everplume volcano lies a rift to the Plane of fire.
 * Mount Mentiri: Scholars propose that the searing heat coming from Mount Mentiri may indicate an active volcano or the existence of a rift to the Elemental Plane of Fire under the mount.
 * Serpent's Head: Due to tremors, the foundation of the keep, the Serpent's Head, has cracked, revealing small rifts to the Plane of Fire.

Thordak banished to the plane
When Emon belatedly realized that the rumors of a great red dragon were true, and that Thordak was a threat, the Arcana Pansophical devised a trap that would banish him to the Elemental Plane of Fire.

During his 15 or 16 years in the Plane, Thordak mostly stayed over the Sea of Fire.

Keyleth's Aramenté
In, Vox Machina entered the Elemental Plane of Fire to help Keyleth complete the Fire portion of her Aramenté. Cerkonos provided a challenge for the group to pass, which they did, but not without finding and barely hiding from a colossal red dragon, later revealed to be Thordak.

Sealing the breach
When the Chroma Conclave freed Thordak from the Elemental Plane of Fire, they created a breach between that plane and the Material Plane through which many elementals were able to escape and wreak havoc. Many of the Fire Ashari druids were slain or injured. Vox Machina, with the help of Gern Blanston, aided the Fire Ashari in sealing the interplanar rift.

The study of Planerider Ryn
The Mighty Nein briefly visited the Plane of Fire in when they used a Plane Shift spell scroll gifted to Yussa Errenis by Planerider Ryn to escape from pursuing Dwendalian Empire forces. They remained within the area of Ryn's study, battling the guardian fire elemental, in order to obtain a long rest, returning the next morning to the Prime Material Plane.