Halo: Flying Lazer Unicorns · 3:56pm Dec 16th, 2021
Random idea. Celestia and Luna find a Forerunner portal in the middle of the Zebrican Jungles with a Forerunner dreadnaught covered in a stone temple complex, followed by it also being covered in tens of thousands of years of vegetative growth.
They somehow manage to push a button.
This sends them straight to Zeta Halo.