Follow me. You're about to see our crown jewel...
[Everyone enters the All Spark Chamber
The First Seven came upon the Cube. We knew it was extraterrestrial because the symbols on its surface matched those on NBE-1. The Dam was built around it in 1935 to mask its signal. Four walls of concrete, as thick as four football fields, enable the Cube to avoid being detected by any humans, or any aliens from outside...
[Frenzy comes across the Cube, whose energy boosts and repairs him
All Spark located!