Magic in Crypts & Things is a far less tame beast than in most other classic fantasy game systems. Things like corruption and attracting the Others' attention makes using it an exercise in risk assessment. That's one of the things I really like about the system.
The term "Ley Line" was originally coined in reference to the placement of certain geographic features -both natural and man made- in relation to one another. Later, occultists coopted the phrase for the idea that "veins of power" ran through the earth. An interconnected web of arcane energies. One of the ideas was that rituals and spells performed along these lines or at their intersections would be able to better tap into that power.
Obviously, this idea has a lot of potential for fantasy stories and games. In terms of C&T, I am imagining a region or micro-setting which is rife with such lines, or perhaps more potent than "normal." Sorcerers come to this land and build their towers to be close to these energies and tap into it for their spells and research.
Such a land would be a strange place. Not just because of the "extra" magic, but because so many powerful sorcerers in one area would have interesting effects on the local power structure. The mages would probably be less interested in conquest or politics than their studies, but the local lords or townsfolk wouldn't want to annoy them needlessly.
"Do not meddle in the affairs of wizards, for they are subtle and quick to anger!" -JRRT
This is an idea I plan to play with a bit over the next few weeks. We'll see where it leads.
