It is about a girl being sent to equestria after being attacked at a concert and reseving a artificial magical core the specific universe is your human and you and yes she is a displaced

Never seen that fic before but sounds interesting

7926703
You'll need to be more specific. Since she is a Displaced, it usually means her new powers came from something like a anime. What kind of magical core is this?

7926729
The core specifically is chaos Magic it was quite literally injected into her with a syringe at the concert on Earth before she was transported