USW: Tip the World Over on Its Side
A proxy ritual is a specific kind of gutter magick designed to bind two people together such that the universe confuses one for the other. This has few physical effects, but any long-range symbolic, magickal effect against one has a chance of affecting the other instead. So, if you cast a curse on your rival, it may instead affect her proxy.
Proxy magick requires potent symbolic interactions, and the more traits one has in common with the target, the better. Sick, desperate cult leaders might raise their own children as proxies to deflect the magick of their enemies.
Stubborn rumors in the underground even suggest the proxy bond can defy death itself, allowing you to channel your demise to your proxy, who dies in your place.