Warning: this technique is so secret, it's practically invisible. Like a ghost in the machine, but with more beards and fewer robes.
Learn Advanced Tactics to take your network sniffing to the next level, but be careful not to get caught.
But first, master the basics, or you'll just end up sniffing around in circles.
Remember, the art of stealthy network sniffing is all about subtlety, like a ninja in the shadows... or a prophet with a really good hiding spot.
Note to self: update the 'Prophet's Guide to Stealthy Network Sniffing' chapter in the 'Book of the Unseen'.