He puts the frostberry pouch in his backpack and mutters the incantation to open a Way back to the mortal realm; he might land somewhere dangerous, but better endangered in the mortal realm than completely lost in the Nevernever. And... nothing. Literally nothing happens, no backlash or fizzling or anything that would indicate that he fucked up a spell, but the kind of nothing that happens when you don't have a spell to cast.
In something of a panic, he tests that he still has magic by punching a nearby tree, which splinters and crashes to the ground. "So that's still working, I guess," he mutters. "Punching systems: still online."
So, recap: magic works, he just got snatched out of deep Winter territory and put into something that kind of looks like the Wyld, and the Ways are on the fritz. Either something big is screwing with him or he's very much not in Kansas anymore. Either way, he'd better figure out what the hell is going on.
Ari sets about scrying the distance and direction to Arctis Tor, palace of the Winter Queen, to triangulate roughly where the hell he is in the Nevernever. Since he is in the Nevernever, and that means he can scry stuff like that. Right?
Shit. He is not in Kansas anymore.
After a cursory scry for the distance to various other landmarks, in case Arctis Tor got firebombed by Titania or something (these also fail, so presumably it has not), and a scry for the distance to Stanley Park to see if he's somehow back in the mortal realm (equally nope), Ari does his best to come to terms with the fact that he is somewhere very, very far from home, and it's unlikely he'll get back any time soon... if at all, really.
Yeah, okay, he's come to terms with it. That was quick.
He'll probably miss Sally and Peter and Donovan and not Garash because Garash is a sparkly little prick, but living in a weird alien forest sounds really, really cool. It'd be nice if there were other people of some description. Not required, though. This looks like a nice weird alien forest. It's got berries.
He performs a quick ritual to check the berries for poison or active curses.
Ari pops one in his mouth to check if they are delicious. He hopes the answer is yes!
Weird delicious berries! Ari is delighted. He takes a handful and sits to snack on them while he comes up with a design for a little earthen cottage. He's so glad he specialized in earth evocations, coming up with an enchantment to keep an ice house frozen would be so much more trouble than it was worth. Thank you, Past Ari, for breaking the Winter stereotype and diversifying your elements.
...Sylphs! This weird alien forest has sylphs for some- no, wait, the wings aren't sharpened. Unspecified faerie-like creatures. Likely sentient ones! Best weird alien forest. "Hi! What the hell are you?" he asks cheerfully, without considering the fact that there is absolutely no reason for an alternate-universe faerie-thing to speak English.
His mouth says "Ari Kaltenbaum, sir."
Shit.
This is no longer the best weird alien forest. This may be the worst weird alien forest.
"Gosh, I don't know where to start," cackles the fairy when he's got Ari home. "So many possibilities! Tell me how you got here. No, first, tell me if you ate anything else or told anybody else your name?"
"I didn't eat anything else, and I know better than to tell anything my name, sir," Ari says mechanically.
"Where I'm from, sir, things can do magic to you if they know your name, and faeries can trap you if you accept a gift from them. But there's no... "fey fruit". I tested the berries for poisons and curses, but ownership wouldn't have mattered. If magic acted the way it does back home. Sir."
"It's got different faeries, sir. There are lots of different kinds of them, and they're either Summer or Winter or Wyld, and Summer and Winter are always at war. There's the common fae and the Sidhe, those are the nobles, and the Queens, who're, well, the queens, Mother and Queen and Lady, and there's a set of those for Summer and Winter both. I was raised by a Winter Sidhe. Very nice lady, which is strange because Sidhe are usually backstabbing bastards, that's in her own words. She got killed by centaurs. Centaurs are assholes."
"I was wandering through the Nevernever- that's the faerie realm - when suddenly I wasn't wandering through the Nevernever anymore so much as standing just about where you found me, sir. I did enough magic to figure out I wasn't in any part of my world, then took some of your berries to eat while I thought about what to do. Which is when you found me, sir."
Ari hadn't actually realized that he could lie to his master, but he's not sure he would've taken the opportunity in the first place. Seems like the kind of thing that might piss him off. Which is bad.
"Well, I'm really, really good at combat magic. I can make my fists hit hard enough to dent steel plate or knock down a moderately sized tree, and I can shield myself or another person from- I'm not sure how to describe the amount I can protect from without comparisons that don't exist here. I can protect them from something a bit less strong than my fists, I guess. I'm very good at commanding earth and stone, I can do some cunning things with lightning and wind, and I'm competent with water and ice. With at least a few minutes and up to a few days and the right components, I can get some very interesting things done with ritual magic, though I'm not sure I can get the right components in your weird alien world, damn. But I can definitely do some basic stuff, finding things or people and warding locations and some other small magic. And I might have enough stuff in my bag for a few larger rituals, though I'd have to check what I've got."
"Go ahead and check. If you get thirsty you can take water from that basin there -" the fairy points out a bowl attached to one of the walls, partly full of water - "don't drink the lake water, tell me if you get hungry, don't eat any fey food I don't feed you, don't go outside or in the water without express permission, don't break things, don't make a racket, hmmmm, don't make me regret not thinking of something to put on that list."