Start with a Universal Egg, Use Me to Create the Artifact

After ending the disaster of annihilation, we should enjoy a peaceful life. As a result... I turned into an egg. An egg that can do nothing but "can make anything". Summoned by Silver, the tail end of the Magic Academy. She is extremely poor because she has an outrageous skill: any weapon in her hand will be fully powerful. The price is: use it once, break it once. Fortunately—— This egg can create a magical weapon for her. Made by the dozen.