LIBER KA is a supplement for Nephilim introducing an alternative magic system following authentic occult principles. The book
The Nephilim history of western sorcery. A grimoire of new spells. Information on the Magician Arcanum. Background on using sorcery in the modern world. An extensive bibliography on modern occult practices.
One of the best books about how to use real magic into a RPG. It's amazingly clear, gives information on major magical practices of today, the symbolic meanings of elements and foci, and how sorcery should work in subtle ways. Not just material for Nephilim: Occult Roleplaying, but useful for any game that incorporates western occult traditions.
Yes, this is exactly what Nephilim needed. Instead of the standard RPG "flashy magic" crap, this is a different system of rituals and traditions, modeled on real-world occultist ideas. It reminds me a lot of my early twenties, so it definitely jives with my extremely limited knowledge. It also adds a very 90s vibe to the magic, not least because it feels a little bit Buffy-esque. For me, at least, the firmly-planted-in-the-90s feel is very much part of the appeal of Nephilim, so that's an added bonus.