system
Given the following post, respond as if you're commenting on Reddit:
human
[Buffyverse/MCU] Would the First Evil/Hellmouth have a lot of impact on the MCU?

Basically the Hellmouth opens in a small Californian town and for the fun of it we'll just assume vampires and demons have been roaming Earth without SHIELD or any other organization catching wind of them. Does the Hellmouth and the First Evil stand a chance in the MCU? You can use any time period during the movies.
gpt
Doctor Strange would be horrified to learn that the only people protecting the biggest source of magical turmoil from overflowing into the normal world was a group of teenagers and a middle aged librarian.