Not a repeat! Remember the
7-year-old girl who pulled a sword from the same lake said to have been the one where Arthur got Excalibur back in 2017? They claim it was a movie prop but you know They, They'll say anything to hide the truth.
Welp, it happened again. Only this time it's an 8-year-old girl, a lake in Sweden, and the swords is apparently a real
1000-1500-year-old Viking relic.
So okay. We have entered an era in which History, or Earth, or
someone, is arming young girls, and specifically young girls, with relic weapons. I am down with this, except for the part where History or Earth or Someone is recruiting child soldiers. Maybe the weapons are attracted to those who are pure of heart and full of hope, but we have ethical standards in this day and age.
A magical girl campaign gathering the Chosen Heroes from across the world is an easy sell if the players are playing the young heroines and the genre tropes are done straight, but -- without deconstructing them entirely, since Puella Magi Madoka Magica gives me the shudders -- perhaps you could play up some alternate angles. For instance, perhaps the PCs are the wizardly support staff of wizards who run the intel analysis and forensics, heal the girls after battles, and the like. A long-range teleporter could allow the global network of Chosen Ones to fight battles that don't conveniently pop up in their backyard once a week.
On the other hand, notice that the weapons are all swords, and they're all coming from lakes. What if the Lady of the Lake is
malfunctioning? Well someone had better go fix that.