DIED AFTER DEFEATING BOSS IN STONE CITADEL

i died due to dot after defeating the count in the same moment.
the iron citadel is failed and i couldnt get the drop but the mission is someway done so i cannot get the last key for the pinnacle of flame. Can someone help me? (Ezomyte Infiltration - Quest Complete but i died before i could take the green book, the rewards and the key)

The key isn't a quest item, it a guarented drop from the citadel boss, you have to do another citadel of the same type or buy it with the trading\alva currency trading.

Note : Those key are expensive, you can also get more than one (Of the same type) depending on how much %waystone drop your map has when you fight the boss, you can easily get more than one key this way but you need a really high amount and there still chance you drop only 1.

thank you very much i though that my char now was totally screwed up, u just gave me hope :)