We Need to Talk About Your Ad Blocker
Slate relies on advertising to support our journalism. If you value our work, please disable your ad blocker.
Enable Ads on SlateWant to Block Ads But Still Support Slate?
By joining Slate Plus you support our work and get exclusive content. And you'll never see this message again.
Join Slate Plus
The Open-Sorcerers
Some magicians are embracing the open-source ethos—but that doesn’t mean spilling every secret.