Avengers: Infinity War and Avengers: Endgame The four work together to create Stormbreaker, a powerful axe that also grants Thor the power of the Bifröst. Thor is near death from the strain of creating the weapon, and Groot uses his own arm as a handle to finish the axe and heal Thor.
While it did save Thor's life and complete the weapon, Groot's sacrifice left a strong influence on Stormbreaker's personality, as disclosed by Thor 4's director Taika Waititi at a press conference attended by CBR.
What allowed Groot to pick up Stormbreaker in Infinity War? - Quora. This is a very simple answer that a lot of people don't understand: You don't need to be worthy to lift Stormbreaker! Unlike Mjolnir, Stormbreaker was never enchanted by the forefathers to only be held by the “worthy”.
He traveled to Nidavellir and forged Stormbreaker, a weapon not only strong enough to kill Thanos but counter the Infinity Gauntlet and even summon the Bifrost. However, the weapon wasn't ready until Groot completed it by dismembering himself - and, in doing so, he became the first person to lift Stormbreaker.
Thor's hammer Mjolnir was defined by the fact that only the 'worthy' could lift it – so basically no-one except the god of thunder (and Vision, for some reason). But when it comes to the weapon's replacement, Stormbreaker – which Thor forges in Avengers: Infinity War – Groot is able to lift it too.
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Who can lift a Stormbreaker?
While no one besides Thor has been able to truly wield the awesome might of Stormbreaker, Groot was the very first being to hold this weapon when one of his arms became the handle for the mighty axe.
Seeing that Thor was close to death after taking the brunt of the power, Groot decided they could not wait for Eitri to find or create a metal handle; he grasped the red hot pieces of metal with one of his arms and then cut the arm off to serve as the handle, truly finishing Stormbreaker. The weapon then revived Thor.
Stormbreaker has the additional power to summon the Bifröst, allowing Thor to teleport anywhere in the Nine Realms. Screen Rant has identified Stormbreaker as the more powerful of the two, based on this ability, as well as it being a much larger and edged weapon.
Avengers: Infinity War revealed that Thor speaks Groot's language, but the reason why isn't the one he gave in the film, according to James Gunn. In a related tweet, Gunn was asked why Peter Quill couldn't understand the language, despite wearing a universal translator.
Thor. In Thor 1, he is no where near as powerful as he is in Ragnarok or Infinity War, but he is still strong enough to be considered a god by a physically superior race. He can control lightning, and Groot is a tree. He could instantly vaporize Groot, leaving him nothing to grow back from.
If Thor decides to use the power of lightning onboard the Asgardian refugee ship to fight the villain and his minions, he may accidentally damage the ship, or worse, even kill his own people. So, he chose to hold himself back, allowing some Asgardians to escape with Valkyrie (Tessa Thompson) and Korg (Taika Waititi).
During a conflict between Beta Ray Bill and Thor, who had been turned into an Herald of Galactus, Bill prevented Mjolnir from returning to its bearer's hand. Seeing no options to reach an agreement, Thor called Stormbreaker and destroyed it by hitting it against Mjolnir.
In the MCU, Stormbreaker was forged by Eitri at the behest of Thor, as a weapon to use against Thanos and his Infinity Gauntlet. In the comics, however, Stormbreaker was still made by Eitri, but pretty much everything else is different.
Comic. Thor's Prosthetic Eye is a cybernetic prosthetic eye given to Thor by Rocket Raccoon as a replacement for Thor's right eye, which had been gouged out by his sister Hela.
As we all saw at the end of Guardians of the Galaxy when Groot heroically turns into a wooden roll cage and sacrifices himself for his fellow teammates, he can grow back from almost anything. So long as there's some good soil and a pot around, he is basically immortal.
Despite putting up a valiant effort, Hela slashed out Thor's right eye, fulfilling his arc in the movie and completing his transformation into the more mature king his father once needed him to be.
During the Avengers: Infinity War Vudu Viewing Party, one fan asked directors Joe and Anthony Russo if this meant Groot was also "worthy." The Russos clarified that the worthiness enchantment that Odin placed on Mjolnir was specific to that original hammer and does not transfer over to all of Thor's weapon.
It's because Thor actually understands Groot, so unless Groot specifically introduces himself by name Thor would just auto translate “I am Groot” into what he's actually saying.
No Thor's merely come up with a pet-name, a name one would use with friends for his comrade-in-arms. He does know his name is Groot (it wouldn't be changed even in translation) but he prefers to call him Tree; just as how he addresses Rocket Raccoon as a rabbit, despite clearly not being one.
Many viewers have pointed out that Thanos was able to lift Stormbreaker without a problem, but this is because the ax isn't enchanted as Mjolnir is. Others believe Thanos lifted Mjolnir (although briefly) and have even argued that he would be worthy of doing so.
The movie doesn't explain Thor's motivations for giving up Stormbreaker, but it makes sense that Chris Hemsworth simply wanted Love to have a powerful weapon to aid her in battle. It's unlikely that he could give her Mjolnir, considering that so few people in the MCU have been deemed worthy of its power.
We're meant to believe that Groot transcends the laws of nature by absorbing wood, acting as a monster with consciousness and generally behaving in manners that do not apply to trees as we know them. Yet Groot's weakness is actually termites.
Weaknesses. Language Barrier: To most people, Groot appears to only say "I am Groot." This made communication with most people all but completely futile. Maximus the Mad asserted that whenever Groot was saying his trademark "I am Groot!" he had actually been saying any number of things.
