Random Incredibly Strong Anime Attacks That Were Only Used Onc (13 items)

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  (#5) United States of Smash - 'My Hero Academia'

  United States of Smash is All Might's most powerful technique. It's not that different from his other attacks - it's a powerful punch with a ton of energy behind it - but the energy levels are on another planet. He managed to grind his nemesis All For One into the dirt with it, despite the fact that his quirk had been mostly transferred to Izuku and his severe injuries made it difficult for him to fight at all. This would be All Might's last fight, and it was one of his most epic.

  This isn't really the first time All Might used the attack, but it's the only time viewers get to see its full glory. Too bad, because it was probably ten times more amazing when the man was at his peak. It's also possible that this won't be the last time we see United States of Smash, either. While All Might's powers were extinguished, Izuku still has a lot to learn about the complex quirk he inherited. 
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  (#4) Zero Hand - 'Hunter X Hunter'

  To use Zero Hand against Mereum, Netero had to meditate for several days. After finally mustering the spiritual power to summon a bodhisattva, he concentrated every last drop of aura he had into its mouth for a dramatic blast attack. This hurt Mereum more than a thousand previous strikes combined, but it still wasn't enough to take the Chimera Ant down. 
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  (#12) Silence Glaive Surprise - 'Sailor Moon'

  In order to defeat Queen Nehellenia, Sailor Saturn, also known as Hotaru, uses her Silence Glaive's ultimate attack, Silence Glaive Surprise (this is only in the anime - the manga version has an even gnarlier final move). Silence Glaive Surprise is a wildly powerful energy attack that destroyed a castle before it was even warmed up.

  The full impact of this catastrophic event is still unknown, since Chibiusa stopped Hotaru from fully executing it. If she hadn't, Hotaru would not have survived. 
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  (#11) Final Stage - 'The Big O'

  The battle against Alex Rosewater and Big Fau might have been lost if not for this one-shot power-up move. By linking herself to the Big O itself, Dorothy is able to transform it into its final stage. The biggest change that the mecha undergoes is the appearance of a giant cannon in the middle of its chest that can fire off enough energy to destroy a giant dome. The Big O was already powerful, but this change makes it one of the most formidable mecha outside of the Gundam franchise.  
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  (#7) The Tree of Depravity - 'Yu Yu Hakusho'

  Fresh from a fight in which he was forced to take a child's life, Kurama isn't in the mood to play around when he faces Elder Toguro. Now a parasite inhabiting Makihara's body, he can regenerate infinitely and therefore will live forever, which is what makes this attack particularly cruel. Kurama summons the The Tree of Depravity, which sucks the life out of whatever being it has in its clutches until that being passes away, all the while forcing it to endure endless hallucinations. Since Elder Toguro is functionally immortal, the torment will never end. 
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  (#9) Super Tengen Toppa Giga Drill Break - 'Gurren Lagann: The Movie'

  The Super Tengen Toppa Gurren Lagann is an enormous mass of energy that breaks all laws of reality, so naturally it's most impressive attack, Super Tengen Toppa Giga Drill Break, is guaranteed to do the same. The drill itself is 20 trillion light years long - 200 times bigger than the universe itself. It also moves faster than light, travelling that distance in a matter of seconds. When the attack collides with the Anti-Spiral Giga Drill Break, space-time collapses on itself. That's the kind of thing you can't do more than once. 

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