The Shards of Erebus - Act 4 Side Quest
Start Location: Argolis
Quest Location: Hades Palace
Objective: Destroy all of the Shards of Erebus inside Hades Palace
You can begin the Shards of Erebus quest by speaking with Eurylochus who is found at the war camp in Argolis, an area just outside of Hades Palace. For this quest what you need to do is destroy all 5 of the Shards of Erebus which can be found inside of Hades Palace.
Note: If you are being rushed through Act 4, you can't reach Eurylochus in Argolis or any of the other NPCs in Argolis by taking the Hades Palace Portal. The wall of Hades Palace will not be blown up and you won't be able to get outside. The only way to reach Argolis is by running from Elysium all the way here.
The Shards of Erebus that you need to destroy are scattered throughout Hades' Palace, a few of them are out of the way and a few of them you run right past. Each Shard of Erebus that you destroy will drop a Crystal of Erebus Relic Shard; with a total of 5 Shards of Erebus that means each difficulty you complete this quest will give you a full charm.
Crystal of Erebus is one of the more powerful charms in the game since it can give you a completion bonus of +2 to all Skills on Legendary difficulty ontop of the charm's bonuses (Vitality Resistance). This charm can only be applied to armor in the helm slot.
Tip: If you are in a Multiplayer game you'll receive 1 Crystal of Erebus Relic Shard per person.
Below you'll find a list of every Shard of Erebus and its location. If you need additional guidance, further down the page you will find screenshots that include every map location of a Shard of Erebus. All of the screenshots are in the same order as the list below. After destroying all 5 Shards of Erebus the quest will automatically complete, you won't have to return to Argolis and turn it in.
Shard #1: In the central portion of The Aidonean Propylon. To reach this Shard of Erebus go through the northwestern doorway in this area to find a portal that will put you on the central platform where the Shard of Erebus is located.
Shard #2: Found in the central area of the Court of Kouloures. Probably one of the easiest crystals to find.
Shard #3: After you defeat The Warden of Souls in the Polis Daemonai area go through the door behind him to find a portal. This portal will take you to a small island with a Shard of Erebus on it.
Shard #4: Just before fighting Hades you'll find two Shards of Erebus on the opposite ends of the hallway that lead to him. This is one of those shards.
Shard #5: Just before fighting Hades you'll find two Shards of Erebus on the opposite ends of the hallway that lead to him. This is one of those shards.