Effect: Enemies rank promoted.

Location : After destroying the first anti-air node, Hornets will be dropped so players can find and assist Sgt. Johnson’s team on the third anti-air node. Take a brief detour to the second anti-air node (the one the Elites took out) it looks like an Egyptian Ibis head set into the cliff. Land on that structure and locate the skull on the tip of the building’s “nose”.

Grab a Hornet after shutting down the first energy node and fly to the second energy node. Upon closer inspection, there is a skull in your Forerunner structure.