Giant green treasure chest

This giant green treasure chest was built by Captain Marvel and Captain Marvel, Jr. who used tree wood from some alien world and then assembled it together at super speed. They placed a scroll inside of it. It was used as a trap for Black Adam, to trick him into saying the magic word "Shazam," so that he'd be transformed back into his mortal form.

Appearance
The Kid Super Power Hour with Shazam!
 * Black Adam's Return