Find the second pylon | Forerunner Halo 4 Guide
Last update: 11 May 2016
Go through a portal on right. Follow tunnel, at which's end jump into a hole. You run into a battle between Convent and Promethean. Stay on the shelf and kill them.
When you kill all enemies, go right. Here you run into another fight. Stay on the shelf and eliminate all of them. After that, start climbing up on the shelf on the other side. To destroy an "eye" which fires laser, you have to fire at it when it's charging.
On the top, kill a Knight on the right. Go on the shelf on right before launching Ghost. You get on a good fire position.
When you eliminate all enemies, return to Ghost and fly down. Kill remaining ones. Fly into a cave (screen). When you get outside, get rid of all enemies and fly into a corridor. Inside you get ammo and weapons.