They can!

While many are hidden, they're numerous enough that it's not very hard to find at least one. Finding all of them is a bit harder, but they don't actually need to do that; they just need to weed out enough so that the trapped portal comes into play. Rain makes a note that he and Kaldur should move away from where M'kel's hidden, so that Nate and Yvette think it's safe to send the speedster into the seemingly empty area.

It's really only a matter of time until they get a chance to spring their trap.

Eventually Nate takes the bait, dashing past a camouflaged M'kel and through the portal she's staking out. M'kel pounces, grabbing blindly for Yvette because Nate is too fast to catch.

Her hand latches onto an invisible arm. "Got you!" she sings out.

"But—what—that's—I've been out invisibled!" laughs Yvette.

M'kel becomes visible, also laughing. I got Yvette! she reports gleefully.

"Your invisibility is better! I only got you because I knew where you'd be." 

Yay!

Yvette decides that, yeah, she should probably drop her invisibility too, even if it'll last another couple of minutes on its own. Just out of politeness. She casts the quick counterspell that'll screw up the invisibility spell's thing, and summarily becomes visible.

"I don't know if I'd say better, mine doesn't last forever, requires actual materials, takes time to set up, and is apparently completely detectable to anyone accustomed to finding stuff with magic, so it seems like it's really more of a different set of trade-offs. How did you know I was—oh, you knew where I'd be because I need to be on one side of a portal. Oh. Oh of course that's an excellent way to find me, augh why didn't I think of that."

Is M'kel going to stop laughing any time soon? Probably not. 

"It was Rain's idea!"

Rain is so good. She tells him so.

Thanks!!

He also thinks M'kel is pretty great, but he sort of feels like that's the kind of thing that shouldn't be broadcasted to Kaldur as well as to M'kel, so he just lets that bubble happily in the back of his mind instead of directly stating it over the link. He hopes she can notice.

"Of course it was. I've had a brother for three days and he's already foiling my plans, augh."

Heee.

"Now you can help us foil Nate and Robin's plans! We've been using my telepathy to coordinate; can I add you to the mental link?" 

"Oh! Uh, yyyes if you only get things I mean to send? Will I not, uh, accidentally bleed whatever I'm thinking to everyone else in the link?"

"I've been using telepathy since I was a baby," M'kel says, "so I'm not sure how hard it is to learn, but Kaldur and Rain haven't shared anything accidentally yet? And I'm not looking for things you don't send, that would be rude." 

"Oh, uh, okay. Let's see how it goes and we'll see how I do with not sharing things by accident? I'd hate to expose you guys to my brain without consent or, uh, some kind of warning label or something. Oh, speaking of." She finds the little magical communicator on her collar and brings it up for speaking through it.

"Hey, Nate, I got out-played and caught and am summarily now working against you! Sorry about that. I recommend putting the magic chalk and communicator down so they can't be used to track you. Good luck, kindly give us massive headaches!"

Giggle. 

Yvette's in the link now! she sends to all three of her allies. 

Good work, M'kel, Kaldur sends. And Yvette, welcome. People's mental voices apparently 'sound' much like their real voices, so it's easy to tell who's speaking. 

Hi! sends Yvette, wondering if she's doing this right. Thanks!

Hi, sis! Okay so Nate next, he's easy now that he doesn't have portals and we do. Robin's harder and I think Nate knows him best of all of us, plus I think he'll take a while to find.

We still might get lucky, but yeah. M'kel starts walking down the corridor, then stops and lets Yvette take the lead when she realises she has no idea where they are.

Should we try herding him into a trap again, only with Yvette to spring it instead of me? 

Or something, yeah. Yvette, can you turn off your noisemakers so I can get a good idea of where he is?

Uhh. I can disarm the ones I come across, and probably show Kaldur how to do it too, but they have no long range magical off switch equivalent. Sorry-not-sorry.

Bah. Okay, where did you last portal him to, and can you get us there pretty quickly?

Sure. I'll get M'kel and myself there and then make portals for you and Kaldur. You're going to have to find other unused portal rectangles that you haven't broken. For me to bring you through.

... Ah. Yeah. Rain briefly reflects on the future applications of leaving his enemy's infrastructure intact while beating them, so he can properly harness their resources after having won. He'll have to think of ways to more neatly do that in the future; this is good practice, he likes it, he's learning so many important things!

Meanwhile, Nate, having anticipated something like this, is nowhere near the place Yvette portaled him to. 

He stops to catch his breath and grab an energy bar from his pocket. He's been doing a lot of running in the last fifteen minutes. 

Kaldur finds one of Yvette's noisemakers. 

What should I do with this?