1Elders
Demons are running around the entire world because the charmed ones are dead. Very few witches are still alive and the ones who are don't know it or are too scared to use their power.
The Elders look from above and see their world in shambles. They don't know what to do without the charmed ones because none of the witches can pick up the slack that was left by the charmed ones.
They then remember an ancient prophecy of four witches finding each other and releasing the magic from within them. These witches would be stronger than the charmed ones and would rival the ultimate power which was now evil.
"Their Magic is too strong and can change on a whim." said one.
"You said Wyatt would be too powerful and you know what happened then Gideon took it as his responsibility to destroy him and could have turned him evil himself." said another
"And since they will be new to the craft they will have the 48 hour window. And a demon will sense that power and try to attack them and then they will have to vanquish him by themselves." said a third.
"Yes but first they have to meet and we don't even know where they are." said the second.
"Oh but I do. I know where all of them are. I have been shielding their power levels. I have moved three of them into the same school over the last three years but right now the fourth's family is under attack by a warlock. But they don't know how powerful the fourth is and he doesn't know he is a witch in fact none of them do. But the fourth has an uncle who is a witch and cousins, who are witches too but don't know it, that live near the other three but only his uncle knows that he is a witch along with his other uncle and his two aunts." said the oldest and wisest.
The elders let fate work its course and the fourth got to choose where he stayed and so he moved to Maryland right after school ended for his junior year in high school.