Sarvoi and Cadaeth are, of course, no strangers to the Tarn of Tears, but you bring them along with Elrisse, Aksel, Tochter, and Niedzwenka there to illustrate part of your goal. "To use a river as a leyline requires three things," you say to them over the gurgling of the river. "Getting it in, getting it out, and keeping it from causing problems along the way. Now as we can see, getting it in is trivial - once it's introduced to flowing water, it flows with the water. I can think of a handful of enchantments or devices to achieve this just off the top of my head. Getting it out is trickier - this river uses a waterfall to release the magic back into the air, which works fine here but wouldn't really be an option for most rivers without obstructing the traffic that flows along it."
"Why not?" Elrisse asks. "Just have a canal that bypasses it for river traffic."
"You're right," you say after a moment of thought. "Actually, if we did it just south of Altdorf, river traffic could use the existing Weissbruck Canal to bypass it. Okay, that's one possible means of discharge. The one I had in mind was just putting down a series of Waystones like channel markers along the run of the river, however many are required for the amount of magic flowing, and then feed it from there directly into a Nexus. Probably the one at Altdorf, though it could also be set up at Nuln and Talabecland if there's some sort of bottleneck."
"The Lynsk could feed into Erengrad, and the Tobol into Castle Alexandranov," Niedzwenka says musingly. "And, of course, the Urskoy flows past Kislev City and into the Talabec."
"We theorized that L'Anguille, Bordeleux, and Brionne were nexuses," Tochter says. "So that's maybe two thirds of Bretonnia's rivers. Oh, and Gisoreux is downstream of most of the Grismerie, so that only leaves a few hundred miles of river that this method wouldn't work for."
