Do you guys think something like ODM gear or Thunder Spears from Attack On Titan would be possible in ZZZ?

So I've been thinking about the weapons in ZZZ and shit, and it got me thinking about how much I love ODMG and Thunder Spears from AOT. Would it be possible for something similar to or just like ODMG (in design and concept, not exact function) be possible in the world of ZZZ? Bonus points on if it could be practical against Ethereals.