[quote=LeeRoy]
How was she constructing armor that is as large as Erde while standing on Erde's shoulder?

Also: "She spoke out in a vocal chant as the threads of essence surrounded her and raised her from the Elemental's shoulder, and it even sounded as though several other-worldly voices joined in the chant."This line sort of implies that now she's floating, so there's that.
[/quote]

The armor ISN'T as large as Erde, it's like two and a half stories tall. As I recall, Erde is much larger. And yes, she was floating, but the Essence Threads that compose the spell are a hardened form of energy, similar to Hard-Light, that have substance and form, while being effectively weightless.The God-Forged Champion of War is fully capable of doing things like walking, grappling, etc... so it could easily stand on a solid surface, such as Erde's shoulder.