Breaches

A breach, also called a portal or wormhole, is hole or rift the dimensional barrier, bridging any location to another.

History
Zoom appears out of a breach with Sand Demon. He asks Zoom where he is and what he has to do to get home, and Zoom simply tells that all he has to do, is kill the Flash.

Barry tries to speed through the breach under S.T.A.R. Labs, but isn't fast enough, and later, Harry comes through the breach.

Barry is set on stopping Zoom, so the team choreograph a fight between him and Doctor Light to lure Zoom into an ambush, but he doesn't fall for it and comes through it later and captures Linda to get Barry's attention.

Before going to Earth Two to save Harry's daughter, Jesse, Barry closes fifty-one breaches, leaving only open, through which Barry, Cisco and Harry use to cross over to Earth Two. The breach behind them destabilizes, but Jay and Caitlin fix it, and Barry, Cisco, Harry and Jesse eventually come back through, and seal it, but Zoom manages to grab and kill Jay, who is actually his time remnant.

With encouragement from Barry, Cisco taps into the energies that binds the multiverse together, as is his power, and reopens a breach to Earth Two so that Barry and Zoom can face-off. But, Zoom gets away after a mini fight with the Flash, and takes Wally hostage as a bargaining chip. Barry gives Zoom his speed for Wally's life, further enhancing Zoom's speed way beyond what it was before and curing him.

As a way to subdue the Earth Two metas, the team sends out a high-pitch frequency specific to that of the frequency that Earth Two vibrates at, affecting people from Earth Two, even Zoom, so Zoom creates a breach with his own power and hops through it. Savitar used the breaches in Central City, which allowed him to pop up wherever he wanted, and annihilated Barry with him not being able to keep up at all.

After two attempts at opening breaches, Cisco opened a breach to another Earth on his third try, transporting him and Barry into the middle of Kara Danvers' apartment.

Cisco later created an inter-dimensional extrapolator that could automatically open a breach between Earth Thirty-Eight and Earth One, and also added the ability to communicate between the two Earths. Kara Danvers utilized this to return to her Earth.

Application
Hunter Zolomon said to look at a breach as a like "door," with a "hallway" in between that's always shifting and twisting, and if you stabilize the door, you stabilize the hallway.

Experienced speedsters can travel through breaches if they're fast enough. The "God of Speed" Savitar is even able to utilize them so well that he can hop in and out of a location. Reverb could open a breach to any Earth he so pleased, and Vibe can uses breaches to travel around the city, but under great strain.

Users

 * Barry Allen
 * Kara Danvers
 * Jay Garrick
 * Jesse Quick
 * Cisco Ramon (Earth One)
 * Cisco Ramon (Earth Two)
 * Savitar
 * Hunter Zolomon

Trivia

 * It seems to take more concentration and skill to open breaches on the same Earth, as evidenced by Cisco when he had troubles opening a breach from S.T.A.R. Labs to the water front, whereas he can easily open up breaches to other Earths, and Zoom never once transported around Earth One by using breaches. Savitar, however, utilized breaches with such preciseness and swiftness, that he was able to shift about and appear anywhere the city.