Parental filter which blocks Tarot and other Black magic
In my home, we use a combination of:


OpenDNS filtering.
Locking down the devices so that the end user cannot change the Internet settings, specifically DNS.
The Mobicip browser, which has a free version, but for advanced features such as specific site filtering, costs $9.99 annually.


I don't specifically filter Black Magic, but there are other things I do block, and these tools allow me to have control over what gets into my network via the Internet.