Chapter 374

Butterfly Effect (バタフライ•エフェクト) is the three hundred and seventy-fourth chapter of Kohei Horikoshi's My Hero Academia.

Summary
In Washington, U.S.A., a weatherwoman reports on a massive cumulonimbus storm that has started growing over Japan and continues to expand, potentially affecting the weather in North America if it continues. This cloud was formed when convection from multiple simultaneous heat sources, which were because of Shoto, Dabi, and Endeavor's fires, combined with a tropical typhoon nearby. The woman, Meryl, continues to speak about if the "butterfly effect" that resulted from the Luminescent Baby's birth has doomed society to fall to chaos, declaring that the power of a single man can change the world. She states her firm stance opposing the world's decision to pander to All For One, forcing the study to cut to commercial.

Back in Kamino, Burnin watches on as Dabi's inferno continues to endlessly increase and consume the city. Ingenium tries to hold Shoto back, telling him his Phosphor move took too much out of him, but Shoto can't believe that despite everyone surpassing their limits to fight, he is the only one still standing. Dabi thinks about how Endeavor being in Gunga is too far away, and knowing that if he sticks to his plan of defeating Shoto first, his body won't last.

So instead, using his feet as jets, he prepares to fly himself directly toward Endeavor. Burnin wonders how even beyond his tenacity, it makes no sense how his body despite not being built for heat, hasn't completely fallen apart by now. Shoto cries out to his brother, telling him not to run away and calling him the "half-baked one" now. But suddenly, Skeptic speaks to Dabi once again through the Near High-End Nomu, giving him the good news of a free ride as he's enveloped in a Warp Gate.

Meanwhile at the U.A. Flying Fortress, the weather and wind begins to pick up, causing trouble for Manual, Eraser Head, and Phantom Thief. The latter declares that their fight will be headed into the history books, and he wants to be known as the reason they won, as there are still active Heroes on the battlefield, and with everyone giving it their all to win, he can't afford to let himself blink once. But they are suddenly taken off guard, as Eraser Head turns to see a Warp Gate form behind them, containing "Kurogiri" and Present Mic.

At the Gunga Mountain Ruins, All For One declares that people's experiences when they're young define who they become, referring to Spinner's dark upbringing, so his feelings for the friends who accepted him are strong. He also mentions he installed a microchip in Nana Shimura's hand to make sure Kurogiri is active no matter what state he was in. He yells that Spinner succeeded as above Endeavor, Dabi gleefully emerges, saying hi to his dad, while from another Warp Gate emerges two Twice's, calling out for Hawks. All For One states that the "sad man's" death, gave rise to the hatred in Himiko's heart, further aided by Dabi, in his quest for revenge, giving her the tool she needed to destroy all. He tells Hawks to watch and see what will happen if he hadn't made his death his top priority before, causing Hawks to panic and cry out they need to kill them now.

Chapter Notes

 * It is revealed a massive cumulonimbus cloud has formed over Japan as a result of the massive heat caused by Shoto, Dabi, and Endeavor's fires, and is continuing to spread.
 * An American weather reporter uses this to voice her opposition to All For One's rule.
 * In Kamino, the Heroes remain speechless unknowing how Dabi is still able to stand and keep fighting.
 * Thanks to "Kurogiri" becoming active, he starts warping the villains around.
 * "Kurogiri" warps himself and Present Mic to Eraser Head's location on the U.A. Flying Fortress.
 * Dabi is warped from Kamino to Gunga, greeting Endeavor.
 * Two Twice Doubles created by Himiko are also warped to Gunga, sparking fear in Hawks.
 * It is also revealed that one of the Twice clones has a broken piece of Froppy's goggles.