Loki decides to trick you. Rather than destroying the chest, he tries to enlist the chest as an ally. But the chest has no interest in taking over the world, and declines.
Err, ninjad.
Your wish is granted. The chest opens, and is empty (*). But the goal is to destroy the chest, not open it, and it is still not done.
(*) Well, there's a portal gun hole, a portable hole, and I've forgotten what else was used to removed what used to be inside this thing.
I place some C4 along the rim, and close the chest lid.
I then get a detonator, set it up carefully, and take shelter.
I press the button ...