It came out of nowhere.
Felix was flying through the shattered skies, enjoying the sights of the many portals, taking the occasional selfie. Then the threads of energy formed between the portals. Felix almost flew straight into one. That kind of thing never happened. And the threads multiplied and filled the air until one...
...Felix now is somewhere else entirely no idea how he got here. While flying through the wilderness the pain starts and eventually culminates with a blood-covered pebble coming out of his mouth. Which was only supposed to happen if Felix was somewhere else so far that the magic that allows his immortality couldn't reach and the only possible place like this would be another universe entirely.
An hour, he gives himself that much time and uses it, but by then Felix decides that crying isn't useful anymore no matter how much he wants to.
Instead Felix searches for civilization, since he is going to stay in this world for the foreseeable future.
Ocean (or possibly just a sea, he's not high enough that the horizon is that far), lakes and forests, the occasional burned husk of a town or farm, are visible below. It's apparently winter - snow on the ground for most of the visible area.
There might be some strange sounds coming from the north, out over the ocean.
Those burned husks are concerning, the strange sounds are even more so. Felix's reflects and puts his floating pebble inside a relatively whole structure that is big enough to contain the thing when it grows to it's full size. With the pebble parked there, Felix then will fly towards the strange sounds.
The sound gets gradually louder and clearer. It's some sort of constant metallic screech.
Okay... Felix will start gathering fog, to give himself a cover and then continue approaching.
Soon it becomes clear that the source of the sound is a large, floating, red-and-black, vaguely bird-shaped thing.
It banks toward Felix.
Oh, shit. Felix starts gathering lighting but it will take forever until he has enough energy for a proper lighting bolt.
Well, maybe it isn't hostile, the large ominous bird-like thing that is nearby a bunch of burned out towns and farms.
Yeah, Felix saw that movie a dozen times, he will just... fly away from it.
Three people flying on... Things, appear from thin air. "Damn, they said it was small. Hey you you, can you use more lightning! Sparky can do lightning!"
There is French swearing. "Well we kinda need it suck it up!"
Felix blinks. He understood the French swearing. He doesn't know that much French... okay, whatever. He flies closer.
"What the hells is that thing?!"
"It's a goddamn Neuroi that's what! Wherever you been for da last twenty five years help us kill it before it gets to the coast and flash-boils another town!"
"I am not from this world!" Felix says, he starts shooting fire at the thing. "How do you kill it?"
The Neuroi has approached close enough to return fire with red lasers(?).
"Worlds? Pfah. It regenerates but has a core keep blasting until we find it. Only three of us and you..."
They've started firing guns and bows and arrows at it along with some kind of magic attack. They produce blue shields too.
"Can you catch lightning or not? Make this a lot less risky."
The French one mutters, "My hair can suffer if it saves us..."
Felix continues the fire. "I can do weather and fire. I'm gathering a thunderbolt."
"I can make a bolt- fire it into the air?" Glance. "Sitting still and talking is about to become very unpleasant."
They all disperse, weaving around the Neuroi, trying to confuse it. After a few moments, a large section of sky flashes with a tree of lightning. Electricity and ozone permeate the air.
It SCREAMS Metallically. The three soldiers don't let up.
Soon it's dissolving into countless fading shards of light.
"Yeah, it's gone. It's... One of the monsters that come out of the giant hurricane over Ostmark. We're Witches, we kill them because nothing else makes much of a dent. Who and what are you?"
"Felix Dalkaila, I'm a Skymage from another universe. I have no clue how I got here, but here I am."
"I've never heard of new worlds but there's enough crazy magic and weird things out there that I believe you. But bloody hell... You don't sound like you came here on purpose?"
He sounds tired and his eyes looks like he has been crying. "No. I did not. You are speaking English. Are we in America?"
"Damn, that sucks. No this is somewhere between Suomus and Orussia. It's just English is the 'ficial language of the Defense Force."