Bluestacks is for android apps. Android is open source and does not protect its copyright. Apple's IOS is not open source therefore you cannot set up a virtual box for their apps with out violating their copyright.
If you can play KoC Battle for the North on an android then you should be able to play on a virtual machine.
I though BftN was only for apple apps.
This is still the wrong forum should be on the Battle for the North forums.