WARNING! Though obviously Muto Prime's story isn't exactly the same as the events of Godzilla: Aftershock due to being in the Age of Kaiju universe, they still take heavy inspiration from it, so you may get some spoilers from reading the rest of the description. If you don't want to get spoiled in any way for Aftershock, read on at your own peril!
Name: Muto Prime
MONARCH Codename: JINSHINMUSHI
Scientific name: Proenigmotherium giganticus (gigantic before Enigmotherium)
Height: 108.2 meters
Length: 135 meters
Diet: Pure radiovore
Affiliation: Major Kaiju (Menace)
Overview: Some rivalries seem like destiny. Some begin with the ancestors of the rivals before the rivals themselves are even born. Godzilla and Gojirin's ancestors had to face off against the direct ancestors of the Mutos: Proenigmotherium giganticus, the last living member of which was named Muto Prime.
History: Muto Prime was a biolithic enigmothere that is believed to have roamed Russia during the Permian. She is believed to have lived rather like the Mutos did in ancient times, implanting her eggs in dead ancestors of Godzillasaurus hondai (which were somewhere in between Rhedosaurus harryhauseni and G. hondai). Fossil evidence indicates a vicious rivalry between the two species. Muto Prime is believed to have been buried in the Hollow Earth by a volcanic eruption, the rest of her kind eventually evolving into the Mutos.
Muto Prime re-emerged in the stone age, and is believed to have come to Japan. Her shockwaves caused earthquakes, and thus it is believed that Prime is the inspiration for the Jinshin Mushi, a legendary, earthquake-causing "dragon beetle" of Japanese myth. King Caesar eventually fought Prime and pursued her to Canada, where she was buried beneath a rockslide (Caesar would not be able to beat her otherwise) triggered by her shockwaves, which would eventually become Mount McKay. At least Prime was buried a second time, she was pregnant with thousands of eggs, which lay dormant with her.
MONARCH discovered Muto Prime in June of 2014. Extra precautions were taken in keeping her asleep: Mount McKay was surrounded by electrical pylons and sedatives pumped into it. However, this would not be enough...
In April 2018, Muto Prime awoke when ex-British army colonel Alan Jonah, an eco-terrorist with a fanatic devotion to King Ghidorah and whom had been involved with SCALE and multiple Battra cults prior, set off bombs around Mount McKay, unleashing Muto Prime. The colossal enigmothere rampaged across Canada, destroying everything in her path from armies to cities, passing through the US states of Washington and Oregon before burrowing underground. She was headed fo The remains of the Fukushima Daichii Nuclear Power Plant, the most radioactive place on the planet, to lay her eggs. After a short stop in Guam, Prime eventually reached Japan and entered her choice of nursery, but Godzilla had followed, and attacked her. The pair were evenly matched and would have killed each other if not for the intervention of Doctor Emma Russell, a MONARCH scientist who had invented a device named the ORCA intended to lure Kaiju away from cities. She used the ORCA to temporarily distract Prime, but that was not the only effect: the Mutos, who had been tailing Prime due to her nature as a pure radiovore making her major potential competition for food, had lost their ancestor, and the ORCA gave them just the right indicator as to where she was. Godzilla and the Mutos then clashed with Prime, Godzilla eventually killing her by crushing her skull and incinerating her eggs with his atomic breath. Prime’s remains where hauled off to the Necropolis and Godzilla and the Mutos parted ways surprisingly peacefully. Unfortunately, this incident allowed Jonah, who himself had been following Muto Prime, to kidnap Doctor Russell, and he would later use the ORCA for his own nefarious purposes.
Powers, abilities and weaknesses: Muto Prime was mostly a physical fighter, possessing incredibly physical strength (she managed to almost knock Godzilla unconscious with one punch) due to their rocky muscles, her nature as a huge, imposing and powerful fighter making many MONARCH agents describe her as a walking mountain. Prime's razor sharp, hooked beak, lined with equally serrated shearing plates of bone, and jagged spikes were also put to good use by her, and she used them to slash and impale foes. Lava was incorporated into her arms, allowing her to burn her foes whilst punching them. Prime’s armour, reinforced with igneous rock, could withstand Godzilla’s atomic breath, and she could generate shockwaves using a similar system as the Mutos’ electromagnetic pulses. Like these pulses, the shockwaves could knock out Godzilla’s atomic breath and even generate major earthquakes by causing the ground to violently vibrate. Muto Prime’s hooked claws could also grapple and tear opponents and were surprisingly effective digging tools that allowed her to carve vast burrows through the Earth’s crust. All of this made Muto Prime a formidable foe on par with Godzilla.
Muto Prime’s only weakness (apart from her slow, cumbersome body) was her soft underbelly. Not only could enemies easily injure the soft flesh there, but the other armour segments were attached there too, and so could be, with a lot of effort, ripped off from there, the method Godzilla used to be able to crush Prime’s head. Still, to attack the underbelly the foe would first have to flip over the sturdy Muto Prime, which was no easy task.
Personality: Muto Prime was a very stoic Kaiju, rarely showing emotion. Due to this, it was difficult to read her motives and even her relationships. Her lack of expression made her all the more imposing and mountain-like in battle.
Due to Muto Prime’s stoicism, it was difficult to interpret her relationships. Her main goal was to lay her eggs, though we here at MONARCH aren’t even sure if that was out if genuine love for them or a desire to continue her lineage. She saw her foes as nothing more but obstacles to this goal, but seemed to have a personal hatred for Godzilla due to him being a descendant of her old prey.
Muto Prime represented a great threat to humanity. If she had laid her eggs, her offspring would have radiated out from Japan, scouring the planet for other radioactive sources. The offspring would have taken different territories and undoubtedly have killed many Kaiju for their radiation. One Muto Prime was enough of a problem for the military (even GDF AKVs were blasted away by her shockwaves and rescue teams tailed her across North America, Micronesia and Japan to rescue both civilians and soldiers alike), but multiple ones may have even wiped out mankind entirely.
Main Character Inspiration: Muto Prime, the main villain Kaiju of Godzilla: Aftershock
Appearance inspirations: The original Muto Prime, the Age of Kaiju version of Femuto and my own imagination
Muto Prime, Rhedosaurus, the Mutos and Godzilla: Aftershock belong to Warner Bros
Godzilla, King Caesar, King Ghidorah, Battra and Gojirin belong to Toho
I decided to break the hiatus with Muto Prime due to Aftershock being released early in some areas (so there was a plot synopsis on Wikizilla which I could use for inspiration for the History section) and because I was always thinking of making Prime the Mutos' ancestor rather than their mother, and because of my "very close relatives have to come immediately after each other in AoK" rule I could go ahead with Prime now. My main aim with the design was to bring Prime closer to the Mutos in design, as I'm not a big fan of the actual design we see in the comic. I'm not quite happy with how the head came out, but I think it's the best I'm going to get.