I can't. I can use my Imagination as much as I like.



But I have gotten it hammered in enough to think. If it doesn't look practical, chances are, it is impractical.



Look at RWBY. The weapons look awesome, the Semblances look Cool... But Then, you think. You realize, No matter what, unless Ruby's Muscles are tightly wound like Steel Cable, she is not actually lifting her Beloved Crescent Rose.



And even if she were like that, That also means she would be able to Punch her Sister Yang into the Stratosphere.



And I say that arm is impractical, because it's purely mechanical. No Artificial Muscle bundles, just Heavy Servos. Not to mention that if it were So Light, it Would be very easy to break. Titanium isn't indestructible after all.



I learned that the hard way.



It's also shit for Blades.