It's for protection.
Shields, armor, even houses, all exist to protect the frail human body.
Then, for those other beings who lack shields and armor and are not born from wombs, what is the hardest protection?
The answer is simple.
It's the eggshell.
During the period when life has yet to take form, it protects them, isolating the world and malice with great defense.
A common bird egg, though unable to withstand a light strike from a stone, can bear several hundred, even thousands of times its own weight.
This is not some intricate magic, but a miracle created by life.
Although mothers will erupt with great strength to protect their children,
Humans born from wombs cannot gain this powerful protection.
So, I had a genius idea.
Why not apply this strength to weapons?
Indestructible, to ensure that this finger claw wouldn't completely break under its own counterforce and to absorb and fuse with some of the eggshell's materials during self-repair.
