- Crossover: DreamWorks Dragons / Marvel "What if... Mjolnir landed on Dragon's Edge" (takes place in Dragons: Race to the Edge) [given by Jokermask8 AO3]

As Thor's hammer, Mjölnir, was flung through the Bifröst after its owner was cast out of Asgard, a stray strand of energy flickered out and struck the mighty weapon, while on the surface nothing to be seen had happened, something did happen, for when it was struck a second hammer had been created within the walls of the multiverse, it hurtled through the strands of the multiverse until it smashed its way into one far away, but not unlike home.

It was chaos, Dragon Flyers were everywhere, fire was almost all Astrid could see up in the sky as Dragon Riders and Wingmaidens fought as best they could, that's when a Dragon Flyer fired upon her and she struck the blast with her axe, leading to its destruction, as the Flyer passed her the Singetail's tail flicked out and flung her from Stormfly's back, falling through the air, Stormfly tried to go after her but was forced to dodge more shots.

As Astrid fell, fear gripping her heart along with determination, there was a thunderous boom and the sky seemed to shatter like ice as an object fell from it, the object was a hammer, small but somewhat impressive in its simple design. Instinctively Astrid reached out, as though it called to her, and just like that it shot right into her hand, which was followed by the sky instantly filling with thunderstorm clouds and lighting blasting down upon her, blinding all.

Once the light faded they saw something that made them all gap in awe and fear, there, floating as though she was standing on air, was Astrid but different, she now had armor that hugged her form, silver arm guards and boots that reached up to her elbows and knees, her leather Gladiator skirt with spikes now had a chainmail underlayer and metal segmented belt, her shoulder guards are now smoother with fur around the edges, both connecting to a red cap that stopped just behind the knees, a silver breastplate with golden edges, a silver and gold headband with tinny wings just above her ears that kept her hair back, and the hammer held in her hand, arcs of lightning sparking off her body in places.

When she opened her eyes they shone with bolts of lightning (think Thor powered up), that is when Stormfly flew over to her and hovered in place next to her rider, Astrid reached out and petted her dragon, resulting in another flash of lightning which lasted a split second, showing Stormfly now had light silver armor along her chest, legs, claws, skull, and tail, lightning also now flowing off her as she looked more deadly than before.

A dragon flyer tried to attack the pair only for Astrid to swing the hammer and send out an arc of electricity that destroyed his arrow and the dragon's fire as well as knocked them from the air, this seemed to be the kick that restarted the fighting, Astrid dropped onto Stormfly's back and the pair flew through the air like they were the wind itself, striking down flyer after flyer and even sending lightning bolts down upon the hunter's ships and send the hammer flying like an arrow that returned to her hand that did great damage to the ships, that is when an army of dragons appeared and helped to free the dragons from the flyers and destroy the ships.

Soon the fighting was over and all gathered again, checking on Hiccup and asking many questions about what happened to Astrid and Stormfly, who did not have much of an idea, she just felt like the hammer called to her, it was then that a new voice joined in, the group all looked to see a tall man in a blue rob and large bald head with white eyes, this was Uatu, The Watcher, he had come to explain what had happened and the hammer, to say they were shocked was an understatement, to know that in another realm there were real gods, or close to such at least and that Astrid was now a chosen user of Thor's hammer itself, he remarks that she isn't the only able to use it, which Snotlout takes it to be him and tries only to impact the floor and not budge it, others tried but nothing, Hiccup was the one to pick it up and hand it to Astrid, saying while cool he thinks it suits her best, getting a blush and kiss from his girlfriend.

The watcher left and time passed, with her new powers Astrid was a big help in both combat and construction, helping to free dragons and keep them in line while also improving their home island, making it a great stronghold and place to live for man and dragon alike, easily able to best those that meant them all harm.