Constructive & Helpful!
Deep under the town of Battleon, a Draconic Oracle breathes in the fumes of inspiration and divination. He will also direct you to find the Heptagonal Chest. He believes it holds an object that will help you towards your destiny, but cannot be sure. This Friday, the seventh Deadly Key will be available from Gorgorath. Once you have them all, speak to Galanoth to open the chest, and reveal... the Elemental DragonSlayer set and the Mysterious Mana Egg pet!
All of the items inside are 0 AC for free storage. Keep the Mysterious Mana Egg pet to unlock a new adventure later this year! (If you haven't collected all the keys yet, you've got plenty of time to start farming!)
From the January 12th, 2018 Design Notes
We are already 1 and a half month into 2019 and there has been no further mentions of this exclusive adventure.