Harbinger of Madness

''Mysterious disappearances have the entire city on edge. Investigate the fates of the missing, dare to face hidden horrors that have broken the sanity of so many others, and destroy the monstrous perpetrator before it consumes your mind. Contains 4 hand-crafted adventures in the streets of Stormreach.'' (Level 15)

Reward list
The end reward of the whole chain, given by Tessa Aster after completing all of above quests, is a mix of items that can be pulled from one of the optional chests in the chain, as well as several items gainable solely from here, and 1-2 items of random loot. So a player has the chance to pull an item directly in one of the quests or get it at the end of the chain. The random items are BtA.

Note that you can talk to Tessa Aster and run the chain again - in any order, as long as you do all four quests - for another reward.

Following is the list of items that can only be acquired by completing the chain.