He stands in the center of his father's Pattern.
Last appearance of the Hall of Mirrors has suggested that he should get very far away from both Amber and The Courts, and Ghostwheel has managed to talk him into exploring the limits of Pattern's ability to transport people.
With Pattern of Amber and Logrus of Chaos both still rather cross with him, there's really only one option for that.
So, he stands in the center of his father's Pattern.
Rinaldo-the-pattern-ghost and the glowing disk of Ghostwheel's presence were both there, watching him depart.
He's not exactly clear on how he's planning to return, so he's geared for trouble - all Trumps he could possibly need, and a some blanks, a dozen spells using Cowrin's Pattern as the scaffold (Sigil of Logrus does seem to obey him for simple magic, but he isn't going to rely on it continuing to behave), a good sword from The Courts, Frakir around his wrist, a pocketful of blue crystals, and various supplies.
Unfortunately, taking the spikard unknown distance away from its ties to shadow is probably not safe, so there goes his source of unlimited magic.
"Well, here it goes." he says, and then concentrates on his destination.
Take me somewhere far, where no-one could have gone before
"Well, I'll be sure to find something amusing to tell them. You can call me Merle, by the way."
"Solas. Nice to meet you. Back to the topic on hand," he chuckles, "I start to think you know rather more than me on what's going on with all this. Is fuzzy memory common here, or did I manage to step into something?"
"It is not common, no. There are certain magics which might produce such effects, but they are rare. Then again, they said you stepped out of one of the tears in the Veil. A spirit would be more like to know of such than a mortal mage."
"So, given that I'm very foreign, probably did step out of some sort of a tear, and missing some interemined amount of memories, what chances would you give on me convincing whoever the jailers are that there's been some sort of mistake, eh?"
"Very low," Solas says wryly. "The current crisis has left the authorities little inclined to charity."
"The mark on your hand is magical, and I have some expertise in such matters. Though I am not affiliated with your captors, their other choices died in the explosion that precipitated the rift you emerged from."
"Possibly..."
"I cannot say for sure while you remain in here, but I believe it may interact with the Breach and lesser rifts in some way."
"And the rifts are likely pouring out demons or something, and nobody has any idea how to close them, huh?"
Did someone damage the Pattern again? This sounds larger than the Black Road and associated incursions... Was the Pattern destroyed, and now Corwin's version trying to hold the world together? He can't really tell without going to Amber, and Hall of Mirrors adivsed him to stay away...
"And I'm in the cell for unknown time, because everyone's too busy with demons to do anything about all that?"
"Uh-huh. Let's say I'm in favor of closing horrible rifts and stopping demons. Any chance at getting to help the locals as an independent contractor?"
"Then as you do not seem in imminent danger of dying, I will go do so." Solas rises to depart. Merlin may notice that he's rather short, in addition to the pointed ears, only slightly over five feet tall
It doesn't particularly register. Many shadows, many kinds of people.
After Solas had left, Merlin carefully calls the image of the Pattern, putting barely any power into it, and checks his spells. Huh. Sleep spell, simple shield, and paralysis are gone, but the rest don't show visible signs of decay... So, he probably got into a fight, but it hasn't been more than a few days from his departure.
He quickly scans the room with magical sight, not really expceting to find anything, and also checks his stuff to find most of it gone, including the Trumps. Well, he'll try to find them later. He dismisses the image.