Eyes up, Guardian.
- You will land in the Lost Oasis, just in front of the large crater nearby.
- Head over to the ledge, and look toward the crater in the very center of the larger crater.
- A massive wave of light will be emitting from the place.
- The Light will wash over the Guardian, beginning to draw out new powers..
- Turn around from the crater and start heading away from it.
- You will see a tree of light coming out of the ground.
- Go inside the nearby cave, just beyond the tree.
- Continue forward through the cave, where you will encounter a few Taken: 3 Taken Acolytes, and a Knight.
- Defeat them or run by them, continuing deeper into the cave.
- Turn to the right when you get into the canyon.
- Over there, you will see another Tree of Light coming up from the ground.
- There are a few Taken Thrall around the tree, drawing power from it.
- Listen to the voice and then continue along the nearby path.
- Go up the nearby slope and turn to the right.
- Continue up the slope to find another few Tree of Lights.
- Going along the main path you will see a few more Taken nearby that you should kill.
- Once again, it is a collection of Taken Acolytes and a Knight.