The Oseram warlord Dervahl kidnapped and tortured Ersa, who later died of her wounds. Now he's on his way to Meridian to take revenge on the Carja. He must be stopped at all cost.
Return to Meridian by using a Fast Travel Pack and enter the Palace of the Sun. Talk to Avad about your investigations at Dervahl's workshop.
The clues you found in Dervahl's workshop led you to a warehouse. Head on over to the warehouse by following your quest marker.
Upon entering the warehouse you will find some Blaze bombs. Investigate the warehouse and find a way to safely deal with the bomb.
You'll have to destroy the window bracket and push the bomb through it. Now that the bomb has been dealt with. Scan the area for any tracks and follow them.
Follow the tracks to an alternate route into the Palace. You'll find Dervahl and his men along the way.
Go to the Solarium and along the way you'll have to take out some of Dervahl's men. Deal with them and continue on the path.
Once you reach the Solarium, a cut-scene will start and Dervahl won't be able to detonate his bomb. When he leaves, destroy the Sonic Device and follow after Dervahl for a fight.
Take out Dervahl and his men. He will be using a Tearblaster to knock you down, but it takes time to reload in between shots. Evade the blasts and aim for head shots in between. Then speak to him and he will summon some Glinthawks to fight for him. Use fire arrows to bring down the machines and then use Critical Hit to finish them off. Defeat them and speak to Dervahl again to start a cut-scene.
