Hi again, I do not need more help with Sanctuary Fortress, but I would..

It's called Darkburst. I believe you find it somewhere in Agon Wastes, but my guide book is out of reach right now... Just hang on to that, I'll get back to you on this.

The Darkburst is in Agon Wastes. If memory serves there is a door that opens from a shot with either the dark or light beam (I can't remeber which) somewhere in the mining stations.

It leads you through a cave and then out into a small clearing with what looks like a huge airplane propeller hanging down in the middle.

If you walk off the ledge into the clearing a sanddigger attacks you. Defeat it and you are pretty much safe, apart from a few kralee. Go over to the bomb slot at the far end and bomb it. This should lower the propeller. Then go to your right until you see an opening with a blue half-pipe.

Go into morph-ball mode and roll over the kinetic orb cannon. When you land, bomb the bomb-slot. This should spin the propeller and blast a hole in the wall outside, which uncovers a dark portal.

Then go back down and boost-ball up the half-pipe onto the ledge to the left. Be careful not to fall off here. Roll along the ledge until you start to go up. Keep going. You should eventually drop onto the propeller. Exit morph-ball mode as fast as possible so you don't roll of the end. Walk along the propeller towards the portal.

Activate it, and go through it. Navigate your way through Dark Aether. If you stay in the protective field until all of the darkling flyers have passed, you should be safe from attack. Go left towards where the flyers came from, and go into the cave. There should be a ledge to the right of you. Jump up it and follow the path, activating the light beacons as you go. You will eventually come to a large gap. Jump over this, then jump again until you come to a door.

Go through this and through the portal. This should bring you out near a door in light Aether. Go through the door and you will come across a kralee, and the Darkburst.

If this information is incorrect, let me know and I will retrace the steps on my game and get back to you as soon as possible.

It's actually called the Dark Burst - you can find it in Mining Station B of Agon Wastes. You need the Seeker Launcher to get in the room. First - use the Bomb Slots in the area to set the drill near the Portal - then use the Boost Ball in the half pipe to reach the top of the drill. Travel through Dark Aether - to Dueling Range - to the Portal there - which will allow you to back track to reach it. Hope that makes sense!