Dzagonur Bastion

I finished the campaign with Magrid and did the quest to get Master of Whispers but I can't find where to start his quest Dzagonur Bastion at. I'm trying to do it to fill my storybook and for the master's point, but I've looked everywhere and cant seem to find where his chain starts at post campaign. If anyone knows I'd really appreciate the help. Thanks!

If you're looking for the Dzagonur Bastion mission outpost, it's located at the North-East corner of the Mirror of Lyss. In your case, there isn't a quest to lead you there. You simply go to the mission outpost and talk to the mission giver dude.