Silver explains that his unique magic Meet in a Dream (hidden meaning: Let’s Have the Same Dream) lets him cross from one dream to another, but he doesn’t fully understand how dreams work or even how his own magic functions.
He says, “it’s a very intuition-based spell…” and he cannot target a specific person’s dream, or pull other people into his own dream (Ortho assures him that it is an incredible ability).
We see Silver use his unique magic for the first time in Book 7 when he rescues the prefect and Grim from the darkness of a dream after Malleus has put the island to sleep.
They temporarily appear in a pink-cloud location that Silver calls a “dreamway” and says that, if they become separated there, he is not sure if he would be able to ever find them again.
He explains that he is able to cross between different people’s dreams, but it is not the same as entering someone’s mind, and it doesn’t allow him to choose whose dream he goes into. He is more likely to go into the dream of a person he has a strong tie with.
(He comments on having met Mickey once upon a dream despite how he can normally only enter the dreams of people he has some sort of association with, and how it is “doubly curious” that Mickey remembers their past encounter.)
Silver is able to identify the owner of a dream by a special, bird-shaped light that will accompany them.
Silver describes dreams as “mental scenery” and “Like a world of imagination made from memories and wishes,” and as one never knows what someone is going to get from a dream beforehand he doubts he would find things related to test questions (for example) if he were to enter a teacher’s dream.
It seems that the “mental scenery” of dreams are not limitless, with Silver explaining that they are unstable mental worlds constructed by the dreamer, and, “When you go off too far from the dreamer, you tend to hit either dead ends or places covered in darkness.”
But it seems that Lilia’s dream was more expansive than Silver had anticipated: when Sebek insists on staying behind with Baul in Lilia’s dream Silver says that he has no idea what will happen if Sebek gets any farther away from Lilia, but there do not seem to be any negative consequences to Sebek staying behind.
Silver seems familiar with the darkness that constantly pursues them throughout Malleus’ dreamscapes, saying that he has had many encounters with it. He says that the darkness will appear in people’s dreams and pull them into a deeper slumber, but it is not specified if it is unique to Malleus’ dreamscapes or something that always exists in dreams.
Silver says he often forgets what happens in the dreams he visits when he wakes up and that it hasn’t been the most helpful spell thus far. He can only use it when he is asleep and is aware that he is in a dream.
The conditions for summoning darkness seem to be fairly flexible, with a happy Sebek unintentionally summoning it when he decides to stay behind in Lilia’s dream forever, Silver’s emotional turmoil summoning it when he realizes the truth of his lineage, and the darkness other times just appearing of its own accord. Sebek seems to suspect that it is being controlled by Malleus, but this is unconfirmed (“No, there’s nothing to be gained from speculation”).
Silver explains that a dream collapsing and the darkness are two different things: dreams collapse when a dreamer wakes up, and he has been trying and failing to wake himself up ever since realizing that he was asleep.
Grim asks how it is that someone could wake themselves up and Silver says, “A strong enough shock in a dream—or in a reality—can jolt you awake.” Silver beating Sebek in a physical fight is what awakens Sebek from his dream.
In-Game Examples: Silver uses his unique magic constantly throughout Book 7.
Twisted Wonderland Reference Note 