Originally Posted by Tenreth
Craft a suit of armor from elements of the kayran's carapace.
After killing and looting the kayran (there’s 2 spots to loot it!) buy the diagram for the armor and have it crafted.
where do you find that scheme. none of the merchants has it
Go to the next mission objective, to the guy who gives you the reward for killing the Kayran. You will also get the diagram from him.