[Voice] 2/2
[Oh so enthusiastically:] Oh, automail is a sophisticated style of prosthetics from my world. If you've heard of something called "cybernetics" it's pretty similar from my understanding.
Basically the prosthesis replicates the lost limb in form and function, allowing it the flexibility and durability to help out the owner. It also uses artificial muscles driven by the body's own nervous system, so it's just as responsive as actual human limbs! It's really quite a miracle of engineering and alchemy together!