Supervolcanic Waifurium

The Supervolcanic Waifurium looms ominously over the Yellowstone Imperial Forest.

Inception

The Supervolcanic Waifurium, otherwise known as the "Yellowstone Caldera", the "Anus of Earth", or "Bob", was a gigamassive mantle vent residing in the Yellowstone Imperial Forest on Earth. Over the course of four phases (as denoted by the Intergalactic Authority for Volcanic Analysis), it expanded from a small crack in the Earth's crust to the largest volcano in Omniversal History.

Phase 1- Pangean Epoch

During the age of Pangea, in the deep past of Old Earth, the Supervolcanic Waifurium began as a miniscule crack in Earth's mantle. During this time, Old Earth was, as with most normal planets, not hollow, and thus the planet had a violently active mantle.

The thin crust, an outer layer of hardened rock around the Earth, was able to contain the volatile molten core; however, this all began to fail when the Magarra Incarnate, summoned to Earth by the Employers, slammed into the surface via Apparition Beam at such a forceful speed that a small crack developed in the crust at the location of impact.

This crack began to slowly grow over many years, as magma from the planet's core began to seep slowly towards the surface. This magma began to heat up the lakes and water above it, resulting in several hot springs spreading across what would become North America (See Continental Hyperdrift Theorem).

Phase 2- Aeternean Epoch

The Supervolcanic Waifurium became a popular tourist attraction when America Aeterna seized large swaths of land across North America, and two explorers, Lewis and Clonk, discovered the hot springs and named the area 'Yellowstone'.

After several decades of general negligence towards the actual size of the Supervolcanic Waifurium, a park ranger noticed that the pits were expanding after his cabin collapsed into one and he was boiled alive.

This pathetic death resulted in an Aeternian Exorcism of the Supervolcanic Waifurium, performed by none other than the Great MAGA King himself. After this exorcism was completed, absolutely nothing changed in the pits. In fact, they began to grow even faster, and began rising out of the crust, forming a large dome in the forest.

The Supervolcanic Waifurium was briefly obliterated by Alduin during the destruction of Old Earth, however this error was rectified with the reconstruction of Earth into Earth 2 by future U.S. President Donald J. Trump.

Grand MAGA Blunder

The MAGA King, in all of his splendorous magarrishness, failed to recognize a grand error in his reconstruction. You see, dear reader, the volcanic swelling inside of the Supervolcanic Waifurium required an active mantle to proceed normally. However, Earth 2 was built hollow. Not wanting to omit any details of the original Earth, the MAGA King simply created an infinite Magma Tank underneath North America. Each year, he would check the levels and remove any unneccessary magma. In fact, during his self-induced exile after the Destruction of Old Earth, the MAGA King spent much of his time resting in a small hibernation chamber located adjacent to this magma supply.