The Shattered Bastion is a location in Tyranny.
The Shattered Bastion Information
General Walkthrough and Tips
When you first arrive in the Shattered Bastion you will stumble upon Rholes the Butcher and Warbler arguing. You can intervene and kill Warbler and his men, or you can leave them to work it out. If you defeat Warbler they will lower a draw bridge to let you up and you can speak to Rholes. You can also head right, no matter what you decide and speak with Gwenyth. There is a rope near her that you can also climb to access the same area that the drawbridge leads to.
Once above, speak with Rholes who will ask you to clear the entrance so that you can enter the cave. Either defeat him and his men and speak with Gwenyth or accept his offer. If you help Gwenyth she will give you Oceans Fire which you can use to open the Cave. (If you killed Rholes and his gang, you can use your Atheltic skills to scare off Warbler.)
If you didnt acquire Oceans fire from Gwenyth already, Hyrax will instruct you to find a missing Earthshaker to clear the cave.