[quote=@Kyubi]
Hi! Random person- 

Okay not really. I'm Exit's other 'friend', and I'd like to ask a few questions mostly about the history of behind the scenes stuff. 

Is there any way to know how exactly the powerful families disappeared? 
What about the powers they mostly wield? (Including the De Silva family) 
Ethnicity of each family? 

Then questions about the forbidden powers; was there certain events or happenings that caused them to be branded as 'forbidden' or do they just decide it's too OP and are like, "Yeah, no."
[/quote]

You will have excuse me as it is almost 1am here!

The powerful families still exist today. The other two families are around, but in order to keep things simple, we decided to keep it between the De Silva and Leighton families. 

Given how old the families were in the beginning they are kind of split across the European ethnicities, as well as various others thanks to many thousands of years. 

As for forbidden magics, there have been several disasters over the course of the last few thousand years that has caused them to become forbidden.