"It's impossible." groaned Eitri. He was searching for a method to combine infinity stone with 'Necro' metal which they named the Necrosword's metal for convenience sake. He couldn't find one.
Even after trying many metals as agents to combine them, it simply wasn't working. The infinity stones and the Necro metal repelled each other as if they couldn't tolerate each other's presence. It was also understandable as one represented creation, and other represented nothingness or void. They simply couldn't be combined to work together.
After hearing the news from Eitri, Eir was disappointed. But she got over it quickly. It was cool to have a sword of the top material but if it wasn't possible than there was nothing that could be done about that.
So Eir suggested to simply create a Necrosword for herself and use uru to create the device to safely collect infinity stones.
Another disappointment.
It was possible to create a sword purely of Nerco metal but the sword itself was a problem. As the sword was created, it developed a consciousness of itself and started to corrupt the mind of people around it. It was a slow process but it will never be good for a person to actually wield it as it would only drive them mad over time.
So the Sword was thrown in dying star to destroy and Necro metal was left alone.
Eitri was highly disappointed in himself. After all this time and with reality stone provided to him by Eir, he wasn't able to create a satisfactory weapon for Eir. The only weapon that could be satisfying at this point was Stormbreaker which Eitri couldn't made without All-father Odin's consent.
Eir also saw this and told Eitri to just create the device to safety collect and use the power of infinity stones, be it only one time. Eitri did just that but he promised Eir that he himself will go and look for a material suitable for using full power of infinity stones.
With that said he still created a beautiful crown made of Uru and Vibrenium combined which had six slots for infinity stones. As this time Eitri had actual infinity stones to create and test the device, it was definitely tougher then Infinity gauntlet.
As crownes were important part of Asgardian attire, that's why Eitri made it like that. Eir wasn't fond of crowns but when she saw how beautiful it looked, she forgot all her complains. It didn't help that it came with a set of beautiful armor so Eir could use and channel the energy of infinity stones from her whole body in a fight. Like she could kick ,punch or even blow someone with a breath like superman and every gesture will be enhanced with the power of Infinity stones.
The armor was also in Asgardian disign and looked beautiful on Eir combined with crown which was glowing with infinity stones. All and all, she looked a goddess from her looks and from her dress too.
She was also given a pair of swords which were called 'Twins'. Twins were powerful weapons as one sword could do physical and spirt damage while other could do physical and soul damage. They sounded similar but on a deeper level they were not. Spirit represented one mental fortitude while soul represented one's connection with the Universe itself.
If someone's spirit were to get damaged their thinking abilities and their psychonic powers will be affected and if soul damage was done that meant there connection to life itself will be broken.
It wasn't anything special on lower level but it will be very effective against higher beings as they had very high physical, elemental and mental resistances. So now Eir could damage her opponents in more ways. If one doesn't work then other will. And if that too didn't work she could just blast them with raw powers of infinity stones. Sure, it won't be as controlled and precise but it was for when there was no option left.
So with all that she was ready to leave Nidavellir and start her plan to get Soul stone.
But when she reached her spaceship Starblade, she was met with another suprise. Being Starblade.
Her ship was modified with many kinds of materials to enhance it's durability. On top of that it's engine was also modified as it now used a magical energy to power itself which was better then before. They haven't modified any other tech inside the ship as they didn't know that stuff. They just made it many times more durable and just replaced it power supply system. Which was huge upgrade in itself as it made it more fast.
Eir testing her ship didn't know if she will even get the chance to use the power of infinity stones as Starblade was now more then capable of dealing with most of her future enemies.
Finally in high spirits she left Nidavellir. She now know how to deal with disappointments: just shower yourself with wonderful gifts.