There's this very ugly...

...thing.

Cool. Once he gets home he is so going to morph that.

Current surroundings of giant spiky ash monster thing?

A destroyed-looking city.

...same location a year ago?

Could plausibly be New York in 1993.

...he is invisible and inaudible and a mile above that smashed-up city.

The scale model probably did not prepare him for this.

There's the heat. Even from that high, he can feel it, emanating from the destruction, from the giant spiky ash monster thing. There's a clear trail of destruction, starting at a literal hole in the ground and moving towards where the over-forty-five-feet tall monster is. But even if that path is where there has been the most destruction—completely leveled buildings, melted rock and metal, a trail of ash and charred bodies—the monster clearly has reach, for a large radius around it is variously destroyed, too. Toppled buildings, dead or severely injured people, fissures on the ground large enough to swallow trucks whole.

The behemoth points a "finger," for lack of a better word to describe it, at—is that a flying person in black spandex?—and lightning shoots from the tip of that finger to hit that person, breaking several laws of physics on the way. The person somehow survives, though, and flies straight into its center of mass, punching it with enough strength to send it stumbling a couple of steps back.

There are many other people in costumes and masks around, although with very few exceptions they seem to be trying to keep a certain minimum distance from the creature. Many of them are focusing on evac, but another number is actually engaging with the attacker in a multitude of ways—high-tech laser guns, forcefields, giant blades, rays of light shot from their bodies...

For a few seconds he is stunned and horrified and confused and then - 

- okay, not to leap to conclusions, but Ash Monster does not look friendly -

- Ash Monster is on Mars. So is Fëanáro, a little higher up to escape the heat, wings struggling to keep him aloft in Mars' far less substantial atmosphere. 

Hello? he says. Can you breathe in these conditions, I can take you somewhere habitable for you -

It doesn't respond to osanwë. It looks around, then up. It claps, and the ensuing sound wave is vastly stronger than it ought to have been.

Ouch. 

He gets flung through the air a bit and tumbles, orients himself by teleporting right-side-up again. His ears are ringing. He is annoyed.

And he has healing and there were people dying back on Earth -

Pop. Back to shattered New York.

Most of the costumed people are efficiently continuing to evacuate. Some are flying around, probably trying to look for the disappeared beast.

Are there injured people anywhere?

Yyyep, lots of them, the masked people are definitely not enough to rescue everyone, they're having to prioritize.

Well, he doesn't. He can teleport to them as fast as he can see them, tap tap tap tap tap tap some might be dead and he can't resurrect them without his peal but even on his own he can heal the ones who are living tap tap tap tap

Lots of people are dead. But also lots of people have radiation poisoning, or extensive internal injuries, or third-degree burns all over their bodies.

(Among the injured people there's this girl, being carried by a person who—isn't wearing a costume, they just happen to be entirely made of the essence of the color white.)

Tapping people is faster than checking if they're injured. Tap tap tap tap tap. He taps the girl and the person made of the essence of the color white and he's all out of people he can see so he goes visible and says to either one of them 'where's the nearest hospital I've got healing'.

He looks about the same age as she is, maybe seven, and exceptionally pretty, and with absurdly long neatly braided hair and very large batlike wings, blue, stretched out to a wingspan of eight or ten feet.

She blinks at him. "You don't have a mask?" she asks, sounding like maybe she's in shock.

The white person, however, points in a direction, and says, "Follow the capes."

Flap flap this is slower than teleporting but he doesn't know where he'd be teleporting to. ...does everyone have a mask? Yeah, everyone has a mask. He makes himself a mask, why not.

Everyone has a mask, most also have variously colored snazzy costumes.

He will soon see a mass of these people flowing in the direction pointed by the white person. In the distance he can make out the shapes of hastily-but-professionally assembled tents, the kind that might be erected to serve as makeshift emergency rooms during wartime and can be quickly abandoned if need be.

It's crowded enough it'd be inconvenient to have to be invisible. If he tries to dart around tapping people is anyone going to get in his way?

Quite the opposite, as soon as they notice just what his taps do they'll start coordinating to be out of his way and make sure as many people as possible can be accessed by him, prioritizing by how grave their injuries are.

Looks like they've had some practice with this.

...good? He is not going to start crying, just because he's never actually seen anyone die before or seen a problem that wasn't solvable on a much better scale than tap-tap-tap doesn't mean he is going to start crying, everything is horrible but tap-tap-tap isn't even emotion-powered and he doesn't need to sleep and he can just keep. on. going.

He will be too late for some of these people.

He will get them back when he finds his peal. (He will keep tapping people. This place is ugly and everyone here is ugly and the costumes are ugly and he will keep tapping people. Why aren't they singing, people are dead, they should be singing. They are human and he knows humans can't sing, but still, they should know better somehow.) Tap tap tap tap.

Lots of tapping. But eventually he'll be done. A fit young man in white-blue spandex and a mask covering his eyes floats over to him, takes him in—wings, outfit, mask—and asks, "Do you speak English?"