Indeed, it's not very long at all before the door to their hideout explodes, and a teenage girl storms in wielding a massive sledgehammer.

"Surrender, assholes!" she yells. "I'm legally obligated to claim that I don't want to hurt you!"

The assholes, perhaps predictably, do not in fact surrender! They are not precisely specced for defending against a teenage girl wielding a massive sledgehammer, but they're going to try.

They do have someone with firepowers though!

"This is what we made you for!" one of them yells at him, shoving him violently forward. "Burn her."

He shakes, folding in on himself, and shakes his head violently. "I don't- You said-"

She ignores the terrified boy, instead picking up the nearest asshole and throwing him at the next-nearest. "You have chosen poorly!" she says, swinging her fuckoff giant hammer into another one's kneecap.

From behind her, a white blur zips into the room and starts hitting people with a quarterstaff.

And a teenage boy walks in, and glares at one of the cultists, who is suddenly frozen in a block of ice. "Shit!" the boy exclaims. "Bad magic -" The ice melts instantly, and he glares again, and the cultist sinks into the floor a few feet and sticks there. "Better! I think."

Aaa? Aaaaa. Ice: not good. ...Person sinking into the floor, also not good, but not as bad?? Probably? He starts to curl down on himself, wrapping his arms over his head.

"You owe us!" one of the cultists yells, aiming a kick towards him.

He shies back, and yelps slightly, "Please, I can't, don't make me, please."

That guy: thrown into a wall before the kick can connect. He splinters the wooden siding and slides down, unconscious at the very least.

"You're making me mad," he says to the rest of them, sounding more nervous than intimidating. "I really think you should give up before you get hurt."

He finishes curling up, crouched down on the ground, and terrifyingly small. And...yes, that's flames starting to flicker over his hands.

At least some of the cultists do seem to have enough sense to decide that surrendering is probably in their best interests. A handful don't, but they're probably fairly easy to handle, especially based on how the fighting has gone so far.

The remaining combatants are taken down with a combination of brute force (on the girl's part), finesse (on the white blur's) and bizarre random magical effects (on the boy's). The girl sets to ziptying their wrists behind their backs, the white blur resolves into some kind of... mouse-creature... whose hands glow as he sets the injured cultists' broken bones, and the boy kneels down next to the cultists' hostage.

"Hi," he says. "You, uh, okay?"

He flinches, and the flames around his hands flare. "M'sorry, m'sorry," he mumbles.

"Um!"

It suddenly feels like the flames are pushing against something. They flicker out, leaving only a faint smell of charred wood.

-Oh. Oh that's- Perturbing, but also good, relieving, that he doesn't have to fight with that...

"M'sorry. I can- I can do better at- Thank you?"

"You're welcome, I guess? I'm H- I'm Wiz Kid. These are my friends Leuco and Olafsdottir. We're going to take these guys to the police. Do you want to come with us?"

"Ah- yes,sir?" (He doesn't not appear to be taking that as an actual question so much as an order.)

"...I'm 15. I don't think you're allowed to call somebody 'sir' unless they're, like, at least 20."

"Oh- ah. What- should I call you then?"

"Uh, I don't know if you need to call me anything? Witness me, not calling you anything. -speaking of which, what's your name? Or your codename, if you've got one."

"Oh, ah- they- called me Nova?"

"...do you... have parents."

He shrugs.

"...okay. Um, you're a mutant, though. So that helps, we can get you enrolled in Whateley instead of just, uh, sending you straight to the foster system."

"Our prisoners are bound and secured," Olafsdottir reports. "I also went through their pockets, but none of them had anything particularly interesting. Besides money, which Leuco tells me I am not allowed to keep. So we can take them to the police."

Leuco nods. "I've healed the ones who needed healing. You really did a number on that one guy, Wiz Kid, I think his spine was broken."

"Not intentionally! Um, Nova, can you follow us to the police station and we'll deal with your situation after we've got the cops on this place?"

He flinches a little at the comment about the broken spine, but nods earnestly the question. "Yes si- Yes, I can do that."