Destiny 2: How to advance Tiers in the Week 1 Nightmare Containment activity

Nightmare Containment is the main action in Destiny 2 Season of the Haunted, and it requires you to fight both Scorn and Cabal Loyalists, as well as the Nightmares they cooperate with. There are three levels of Containment in week one, each increasing in difficulty. The majority of them boil down to "kill enemies, dunk balls," but there's more to them than that. There are presently three levels of Nightmare Containment, each one a little more difficult than the last. There are four steps in Tier 1 of Nightmare Containment.

• Kill Scorn foes, taking particular attention to the spawning Dread Bearer yellow bar hordes. Killing them will drop a Core of Dread ball, which you can return to the Nightmare Harvester for more Shards of Dread.

• Egregore Atavist Illusions, two yellow bar Psion bosses, will spawn. Kill them to summon the real Egregore Atavist inside a translucent energy bubble. Because you can't shoot through the bubble, go up and punch the Psion inside to go on to the next step.

• You're back to murdering Scorn in order to earn Shards of Dread. Continue concentrating on Dread Bearers and dunking Dread Cores.

• A boss will spawn if you completed the previous three phases. He'll become immune if you burn him down to half health. In the air, two Resonant Splinter orbs will spawn. Break the shield by destroying them, then burn the boss's remaining health.

Tier 2 of Nightmare Containment is a slightly more complicated Tier 1.

• You're back to killing Scorn and collecting Shards of Dread, but there are new Overload Champions and yellow bar foes to contend with.

• The next encounter pits you against Cabal once more, but this time there are two Egregore Atavists to dispatch, and they spawn all across the encounter area. Defeating their Illusion once more summons the real Psion, and once the last of the four has died, you can move on to the next level.

• Step three is the same as the first, so kill Scorn, bank points, dunk Cores of Dread, utilize the Relic, and so on.

• The final step pits you against a more powerful Cabal boss. He'll get an immunity shield of about 50% health. Burn him down after destroying the four Resonant Splinters that appear.

For the time being, Tier 3 of Nightmare Containment places you against Elykris, a nightmare counterpart of a boss from the Forsaken expansion. There are three phases to the fight.

Elyrkis will become immune if his health is reduced by about a third. Six Resonant Splinters and two impervious Emissary of Elykris Abomination will spawn. To take down the Emissary shields, destroy the Splinters. Kill the big guys to give the boss immunity. Repeat the technique to burn another third of his health.

During the last battle, Dread Bearer foes will come. When you dunk the Cores of Dread, Scythe relics appear, which you can utilize to give free burst damage to the monster. To spawn the prize chest, defeat Elykris and you'll get a chance at an Opulent Key and the ability to spend Vestiges of Dread to get Bound Presence. In the Sever weekly quests, you'll use the Bound Presence to open the final chest and receive additional goodies.