"Yeah, I don't exactly have a physical form that can be... not... okay..." he reassured the human, whilst struggling to find any better words to finish that sentence.
In truth, it had been a while since the blade needed this much magic. Even though he could remember the last time as clearly as if it were the day before, thousands of years of being dormant were evident. There was a bit more strain on the sword's power source. In this case, Flit.
Still, he did not want the humans to worry for him. They had been so kind thus far. The least he could do was show them how to use the weapon properly, so they could use it if anything were to go wrong.
"Alrighty! Umm... Earth..."
Earth was perhaps Flit's least favorite element. It was course, it was dirty, and somewhat difficult for him to call upon. He struggled somewhat to think of a good lesson for this element.
"Earth is... Umm... Ah! Earth is very... sturdy! Very stubborn. You, uh, need to tap into the ground underneath you. That's it! Tell it who's boss!"
Flit was pretty much making this up as he went along. He wasn't wrong about it, he just never really had too much practice with it. As a being of the sky with very little physical strength or mental resolve, he was a poor candidate for such magic. Still, maybe this human could tap into it.