Why Berserkers are weak to the Foreigner Class (kinda sorta theory but here me out).
(This was a post originally submitted in my old account, but I want to bring it back because I saved it on my docs. )
Do you know what took me the longest time to realize playing Fate/Grand Order for at least 4-6 years now?
That Berserkers are weak to Foreigner servants because of their lack of sanity.
When you think about it, for a heroic spirit to become a berserker class servant, they got rid of any sanity left in them to gain the power to defeat their enemies in the Holy Grail War.
In some cases, a berserker class can be the weakest and strongest class because they are a power balance to weigh out the war from any other servants that might get a head start to fight them. In FGO, Berserker servants and enemies gain a 2.0x double attacking power against any class of servant..
It’s crazy how the most cracked-out class unit of the game, let alone the Fate franchise, could be the most balanced by just selling the sanity for corn chip and power.
But then Hercules exists.
To this very day, I am baffled that Hercules in his Berserker form is his WEAKEST form. It melts my brain just thinking about it because even in his weakest class, he is a literal war machine, let alone a straight-up beast doing unimaginable feats that question how insane the Greek servants are in Fate.
(Don’t get me started on his list of noble phantasms like his 12 labors, God's Hand, and Maine of the Nameaon Lion because we would be here all day.)
Long story short, the Berserker class is insane (pun intended), which brings us to the Foreigner class and why they upset the power balance of the Berserker class.
Foreigners at the time were a class of servants that made contracts with beings beyond the fabric of reality. They are what we know are the Outer Gods and Elder Gods from the stories of H.P. Lovecraft. These are creatures that no mortal human can comprehend. Just trying to understand the nature of these beings can burn your brain to mush and cause you to lose your mind.
Berserkers are no exception. The Elder Gods, Outer Gods, and The Old Ones all consume chaos and insanity as their drive, berserkers barely lack enough sanity to fight a foreigner. If we’re going by not only the lore of H.P. Lovecraft and Fate lore, chances are the berserkers have a fighting chance, but then lies the problem.
While half of the roasters of berserkers do have sanity left in them to function freely, they are limited by their madness enhancement. Even some of the Foreigner-class servants currently in the fgo roaster are alien life forms from our solar system and universes that aren’t in contact with any Outer God.
MHX, MHX Alter, Mysterious Ranmaru X, Ciel- Servantverse
Voyager- Satellite of Pan-Human History
The Types/Ultimate One, Wandajin, Koyanskya- Alien Life Forms
Mesoamerican Gods- Gundams, but if they were spiders
Now we do have the Salem manga in the Epic of Remnant manga series being published, so we might have a chance to see a berserker and a foreigner fight each other. Unfortunately, I don’t know where to read the translated manga online, so I don’t mind waiting for the pages to be translated into English. Let's hope for the best!
(I would also add in the Mooncell since it is also alien in origin, but my brain cells aren’t ready to go back to the Extra lore. I don’t wanna go back, please; it’s too much sometimes.)