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. There are tornadoes of flame tearing through the landscape, and jutting bits of glass-like rock poking from beneath the ground causing beautiful, dangerous, jagged gardens of melted sand. Black clouds of smoke and ash rise from multiple volcanos, carrying a sulfuric and ionized scent. The temperature is extremely hot.

The Portal in 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, called Pyrah, around the portal, guarding it to maintain 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 River Inferno has ties to the Elemental Plane of Fire.

Everplume
Experts believe that in the center of the Everplume volcano lies a rift to the Plane of fire, in the center of the volcano.

Mount Mentiri
Scholars propose that the searing heat coming from Mount Mentiri may indicate a sign of an active volcano or 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.

The City of Brass
The City of Brass is a large settlement within the Plane of Fire, 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
The Plane features 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
The Mighty Nein used a Plane Shift scroll gifted by Planerider Ryn to Yussa Errenis to reach a cavern used by her as a study or library. It was guarded by a fire elemental.

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.