Perrin takes some medieval Ambien and discovers he can magically spy on the real world when he’s asleep. He finds the Waygate open and meets Slayer, a creepy dream-walking dude who looks like Lan. He seems to be the one allowing Trollocs to enter the Two Rivers. Perrin returns to Emond’s Field for medical treatment.
Perrin is stuck in a wolf dream after Faile made him swallow a vile concoction. He can still cover vast distances in a single stride, so he uses the ability to wander around the Two Rivers. The farms are largely abandoned, except for a few that show signs of activity. From these mere observations, Perrin makes two deductions:
- That his influence really has saturated the Two Rivers.
- Since his dream matches up with what he thinks reality ought to look like, the objects in the dream must accurately reflect reality.
Perhaps you can spot the logical flaw here. 
The problem is, without being spoon-fed these conclusions, I don’t think I ever would have arrived at them independently. Not in a million years. This would be the first time in the entire series that we witness the dream world’s state acting as a real-time reflection of the waking world. You realize this is a massive loophole cheat code, right? A man can instantly spy on how objects are arranged anywhere in the world? (…universe? Does this thing have a range? Fuck!) Sorry, but you would still need to obey the rule that information can only travel at the speed of light. And if you aren’t ready to allow that much of Einstein into the Wheel of Time universe, then good luck explaining causality. Maybe it is possible for information to travel as fast as it does (and must), but consider this: essentially, when Perrin is in a wolf dream, he is effectively hooked up to an advanced virtual reality simulator. He’s in the Matrix. Whoa!
Incidentally, I now completely fault Wheel of Time for getting me interested in lucid dreaming when I was a teenager. I was fifteen, and for years the Internet had been something enticing and just out of reach for us nerds who connect to dial-up bulletin board systems. When we finally got the World Wide Web, we could all find our rabbit holes to explore. I figured lucid dreaming is as close to this mystical dreaming bullshit in Robert Jordan’s stories as I could get, and was any of it real? Fuck, I was fifteen, I didn’t know for sure. Nowadays I know that this real-time connection between the waking world and dream world is absurd, but shit like this is also enticing. Alas, I was never any good at lucid dreaming and it became a massive waste of time. Thanks for that, Jordan.
Moving on, let’s just take it at face value that Perrin can somehow transfer information from any arbitrary part of the world to another. He notices some ravens circling near the Westwood. Following them leads to the Waygate. Perrin is startled to find it open. Strange, considering Loial placed both of the Avendesora leaves on the inside of the Waygate. Someone must have opened the Waygate from the inside! Perrin stupidly tries to put a hand into the Ways. Luckily, the dream world has been idiot-proofed and his hand meets a solid glassy surface. Then he realizes the gates are closing, and jumps out of the way. Ruh roh! Looks like a nasty evil thing just touched down in the real world!
Slayer appears, and commends Loial’s idea of locking the Waygate from the inside. Who the hell is this dude, anyway? One of the Forsaken? Perrin exits the holodeck before any permanent damage can occur. Back in reality, the Waygate will have to wait. Perrin still has an arrow lodged in him, so it’s on to Emond’s Field.