Divinity Original Sin 2 offers players an intricate world full of secrets, hidden treasures, and complex puzzles that test your problem-solving skills. Among the many mysterious items you can uncover during your adventures across Rivellon is the Key of the One. This guide provides a detailed look at where to find this valuable key and how to solve the specific puzzles associated with its quest line.
How to Acquire the Key of the One
To obtain this special quest item, players must navigate to the Driftwood Arena located beneath the local tavern on Reaper's Coast. You will need to challenge and defeat the reigning champion, Murga, in a grueling combat encounter to prove your tactical worth. Once she is defeated, a nearby chest containing the key will unlock, granting you access to the next stage of the Academy quest line.
It is highly recommended to prepare your party with adequate crowd control spells and high physical armor before starting the arena battles. Taking down Murga requires careful positioning as a sudden voidwoken ambush will complicate the final phases of the arena fight. Successfully managing both threats allows you to claim the key safely from the treasure room chest.
Locating the Barrier in the Academy
Once you reach the Nameless Isle later in the campaign, you will eventually gain access to the massive Teacher's Hall inside the ancient Academy. The Key of the One is specifically designed to unlock a large, heavily fortified door that blocks entry into the Proving Grounds. This barrier prevents casual exploration, meaning players must carry the key in their active inventory to interact with the doorway mechanics.
If you somehow missed the arena quest on Reaper's Coast, alternative high-level thievery skills can sometimes bypass similar obstacles throughout the island. However, using the intended quest item ensures you do not trigger accidental traps or lock yourself out of unique dialogue sequences. Exploring the area beyond this door rewards your party with immense experience points and critical historical lore.
Solving the Academy Phase Indicator Puzzle
Behind the locked door lies a complex environmental puzzle involving glowing tiles, power conduits, and phase indicators that must be aligned properly. Players must manipulate several pressure plates and pillars to direct source energy toward the central barrier mechanism. Moving heavy objects or positioning individual party members onto specific floor switches will change the orientation of the energetic beams.
Using the Spirit Vision ability in this chamber reveals ancient ghosts who provide subtle hints regarding the correct alignment sequence. You will need to balance the power nodes carefully so that all connected lines illuminate simultaneously without overloading the localized network. Completing this puzzle opens the path to the chosen testing grounds where your companions face their final ascension trials.