Here’s everything you better know about Nightmare Containment in the Season of the Haunted.

If you intend to take on Containment activities specifically, choose the Containment option.

They also slowly get more difficult over time, with the third tier culminating in a big boss fight.

There are two options to get into the Derelict Leviathan, but either will let you take part in the Nightmare Containment activity.

Sprinkled throughout this first wave are tougher Nightmare enemies called Dread Bearers.

These are Elite enemies with yellow health bars, and they’re tough to bring down on your own.

When you kill a Dread Bearer, it’ll drop an orb called a Core of Dread.

Hunt down the Dread Bearer Nightmare enemies and eliminate them fast for additional Shards and to unlock the reaper scythe Relic weapon.

That scythe is a powerful, if temporary, weapon to use against the waves of enemies.

Once you kill the first two Atavist Illusionists, you’ll reveal two Eregore Atavists.

Repeat the process to kill the second two Eregore Atavists to end the wave.

You’ll need to find and punch the Egregore Atavist enemies in order to eliminate them. Look for Psions called Atavist Illusionists and kill them first to make the Atavists appear.

However,you don’t actually need to complete the tier to move on to the next one.

Like with Altars of Sorrow, you’ll need to activate it relatively quickly to keep the activity going.

As you damage it, the Harbinger will gain a shield that protects it from damage.

Look out for the diamond-shaped Resonant Splinter objects to appear near the Harbinger. Destroy them to knock out its shield.

When that happens, look for diamond-shaped Resonant Splinters to appear in the area around it.

Shoot them to knock out the Harbinger’s shield and finish it off.

Your goal to start with is to do as much damage to the boss as quickly as possible.

The boss will gain a shield every time you remove a third of its health, so be ready to act quickly to destroy Resonant Splinter and Emissary enemies in order to keep damaging it.

These are your next targets, and you’ll want to take them out as quickly as possible.

The lockdown protocol refers to side rooms that are normally locked off and inaccessible.

Flipping the switch opens the nearby door, which will reveal a chest and provide additional rewards.

Spend your Vestiges of Dread at the Nightmare Harvester scepter to unlock seasonal rewards from the Nightmare Containment activity.

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Search for extra chests after completing Nightmare Containment Tier 3. Look for green switches that beep hidden around the edges of the area.

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