Temple of Styx

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The Temple of the Styx is the gateway of the Underworld, and acts as the barrier between the surface world and the land of the dead. At the back of the temple, the watchful hellhound Cerberus assumes his post, devouring any soul attempting to leave. The Temple is the 4th and final biome Zagreus must fight through in order to escape the Underworld, after surviving the perils of Elysium. This biome is structured differently than the previous three biomes of the game, featuring 5 wings of small chambers with rewards only offered in the final room of a wing. A full clear of the Temple of Styx will be 33 chambers.

Layout

The Temple features a different layout than the previous biomes. The first room of the biome is a hub room, which Zagreus will be returning to often as he travels here. Charon's final shop (aka the "Mega Shop") will always be found in the hub, offering a Hermes Boon, and 4 other various upgrades (God Boons, Centaur Hearts, Poms of Power). He will also offer for sale one of two bounty resources: Diamonds (1000 Obols) or Titan Blood (1500 Obols).

Charon can offer upgraded versions of Centaur Hearts, Boons, and Poms of Power. The Hermes boon in the shop will have increased prices. Any upgraded variants of items will have increased prices as well.

In order to escape Styx, Zagreus must search for a Fetid Sack within the Satyr Tunnels of the temple, in order to persuade Cerberus to abandon his post and allow Zagreus past. 5 wings of Satyr Tunnels will open from the hub room. Each wing consists of compact and small chambers with no reward, concluding in one final larger chamber where the reward is offered. 2 of the Styx wings will always be Elite wings, offering more dangerous encounters which end with a mini-boss, and have increased rewards.

The Styx wings, with no Fated Authority used, will always offer 2 or 3 Boons and a combination of Obol, Pom of Power, and Centaur Heart rewards for the remaining wings. If Fated Authority is used on a chamber, it will not revert back to its original version if Zagreus travels down a different path instead, and returns to the hub later.

After finding the Fetid Sack, Zagreus can talk to Cerberus, who will accept it and leave the room, allowing access to the Exit Door of the Underworld. When Cerberus moves, all remaining wings of Styx will be closed, and Zagreus will no longer be able to enter them. Charon's shop will remain open, allowing for potential last minute upgrades.

Traps and Features

Traps

Styx features the most deadly traps in Hades. All of its traps deal very high damage and activate very quickly.

Guillotine traps are the most common trap in Styx. These traps drop large axes from the ceiling, which do very high damage should Zagreus or an enemy be beneath them. Networks of these axes can be linked to pressure plates in rooms, or they can automatically trigger on a loop.

Another dangerous trap in Styx is the Snake Saw launcher. These traps continuously shoot large buzz-saws across the room, in a straight line. These saws can be deflected, but cannot be destroyed, and do very high damage to anything in their path.

Styx also features poison vents on the floor, which randomly release poison clouds. These clouds can only harm Zagreus, and inflict him with a stack of Styx Poison if he lingers for too long within a cloud.

Features

Every Styx chamber contains at least one Mandragora Curing Pool, with larger rooms containing 2 or 3 of them. Mandragora Curing Pools can be used to cleanse the Styx Poison debuff from Zagreus. Curing Pools are often placed in precarious positions, usually around traps. Using a Curing Pool puts it on a very short cooldown before it can be used again, and Curing Pools cannot be used if there are nearby enemies.

Additionally, Chaos Gates and Heat Gates cannot spawn in any Styx chamber. Wells of Charon, Infernal Troves, and Pools of Purging can however, albeit at a reduced rate compared to other biomes.

If unlocked, Valuable Urns (Urns which contain gold) are more frequent in Styx than in every other biome.

Unique Chambers

Styx features one unique chamber which is the "Storage Room". The Storage Room is guaranteed to spawn in one of the 5 wings of Styx, as a replacement for a larger final room in a wing. The Storage Room will contain that wing's room reward, as well as the Satyr Sack and a Fountain. The fountain will heal for more health than any other fountain in a run but is the only fountain in Styx. The Storage Room will not be the first wing you choose to enter.

Styx currently features no NPC room encounters, unlike every other biome in the game (not counting the hub room with Cerberus and Charon in it).

Mini-Boss Encounters

Styx features 4 potential mini-boss encounters, which only spawn as the final room of an elite wing. Up to 2 of these can be encountered in a run. The mini-boss encounters of Styx are an upgraded Dire Bother, Snakestone, Gigantic Vermin, or Satyr Cultist, with various Styx enemy reinforcements. These variants will have a different appearance, increased armor and health (more than a typical Elite of the same type) and improved attacks. While alive, these Dire enemies will continue to spawn enemy reinforcements up to a cap. These encounters end when all enemies in the room have been defeated, including all remaining enemy reinforcements. Their reward is always the reward of the wing they were found in (which will be of increased quality).

• The mini-boss Bother spawns in a rhombus chamber with Snake Saw launchers and Gigantic Vermin reinforcements. It attacks by launching multiple deadly explosives in a circle around itself, leaving little room for safety between poison puddles and AoE damage.
• The mini-boss Snakestone spawns in a large rectangle chamber with a large chasm through the center and Satyr Cultist reinforcements. It attacks by shooting lasers in 360 degree around itself, while cultists use poison dart to flush Zagreus out of cover.
• The mini-boss Gigantic Vermin spawns in a narrow multi-level chamber with pressure-plate axe traps and Bother reinforcements. It attacks by spewing large poison puddles and lunging at Zagreus very quickly.
• The mini-boss Satyr Cultist spawns in a small chamber with almost no cover and Crawler reinforcements. It attacks by shooting multiple poison darts at a time.

If the pact Middle Management is active, two different mini-bosses will appear in each encounter instead of one.

Boss Encounters

The Temple of Styx itself features no boss encounter, but once Cerberus abandons his post and allows Zagreus past, the doorway to the surface will be revealed. When opened, it will lead to the Final Battle, with an entity who is all too eager to send Zagreus home.

The reward for this encounter is a Titan Blood Bounty if it is the player's first victory against the Final Boss, or if they meet the Target Heat from the Pact of Punishment. Otherwise, it is a Darkness drop. By default, this drop is 250 Darkness, and is affected by boons and bonus effects.

Once the Final Boss is defeated, a path will be revealed to escape the entrance of the Underworld and Zagreus can finally travel to the surface world. However, as of the current release of the game, this will lead to an end game cutscene which will narrate a potential way for Zagreus to die on the surface world, and return to the House of Hades.

Enemies

These are all the enemies that can be encountered in any Temple of Styx chamber. All of these enemies can also appear as Elites, giving them armor and occasionally upgraded attacks.

Enemy	Appearance	Attacks And Abilities
Bother		Attacks by lobbing high damage bombs at Zagreus' position.
Crawler		Moves incredibly fast and deals contact damage with a very short attack animation. Additionally, has very few hitpoints, and can be dispatched in one hit (two hits if Elite). These enemies cannot trigger traps, despite being walking enemies.
Gigantic Vermin		Attacks with a short-range melee jab which deals high damage. Can create puddles of Styx Poison around itself.
Satyr Cultist		Attacks by shooting 1 poisonous dart at Zagreus. Darts do minimal damage but inflict Zagreus with a stack of Styx Poison. As an Elite, fires a spread of three darts instead of 1 dart.
Snakestone		Shoots multiple lasers in a spread at Zagreus. Lasers do 2 damage every tick it hits Zagreus, and hits rapidly. Lasers move fast, and converge together at a single point. Multiple lasers can hit Zagreus at the same time. These enemies float, and cannot trigger traps.