Earth
“We’re creating a specific type of rock… but which of the types of rock is it?”
“Well... what kind of puzzle is this?”

Metalbending → [_] _ _ _ _ _ _ _ _ _ _ _
Brute Force…? → _ _ _ [_] _ _ _ _ _ _
States Rock → _ _ [_] _ _ _ _ _ _
A More Earthly Calendar → _ _ _ _ [_] _
Dream Land → _ _ [_] _ _ _ _ _ _ _ _ (if C=MPa=300)

Earthbenders may seem stubborn and stoic, but what are they on the inside?