Altar of Fangs is the only brand-new dungeon in Midnight Season 2, and it fits a full run into three bosses across three floors. It sits on the Coiled Isle, the venom-soaked island east of Zul'Aman that Patch 12.1 finally opens, and every fight leans on the same theme: poison, snakes, and an Amani warlord trying to wake something that should have stayed sealed. Rav'i eats. The Writhing Coil splits apart. Zul'jan channels a ritual that ramps until you stop it. Miss the wrong mechanic on any of them and the run ends in seconds.
Altar of Fangs is carved into the Vaults of Atal'Utek on the Coiled Isle, the island east of Zul'Aman that opens up with Patch 12.1 on August 11. It is a level 90 dungeon. You reach the isle through the 12.1 campaign, and launch week already runs the place up to Mythic 0. Only Mythic+ waits for Midnight Season 2 on August 18, and from then on a Keystone is the only way in.
Getting there on foot: three gates cut into the Vaults of Atal'Utek from the Coiled Isle surface, and any of them drops you into the complex.
Once you are through a gate the dungeon door sits at 47.2, 67.6, in the southern chamber, and both maps below mark it. The run carries a campaign quest too. The Vaults of Atal'Utek: Altar of Fangs simply asks you to clear the dungeon. Time a +10 once and Path of Venomous Evolution lands in your spellbook, dropping you at the entrance from anywhere and making the walk in a one-time problem. Our Midnight dungeon entrances guide has the door coordinates for the expansion's other dungeons.
It is a compact crawl through four named areas: the Carnage Pit, the Mutation Chambers, the Ancient Burrow and the Sacrificial Approach. Those stack onto three map floors, one boss per floor, so the run climbs steadily from the pit at the bottom to the altar at the top. Three bosses, short trash sections between them. A dungeon this tight rewards group knowledge fast, so learning it early pays off.
| Quick Facts | Detail |
|---|---|
| Location | Vaults of Atal'Utek, the Coiled Isle |
| Players | 5 |
| Level | 90 |
| Bosses | 3 — Rav'i, The Writhing Coil, Zul'jan |
| Launch difficulty | Up to Mythic 0 (August 11) |
| Season 2 addition | Mythic+ (August 18) |
| Keystone timer | 29 minutes |
| Patch | 12.1, Curse of Ula'tek (Midnight) |
The three encounters run in a fixed order, and each one tests a different skill. Rav'i is your shield-breaking and floor-awareness check. The Writhing Coil turns into an add fight the moment it splits, and Zul'jan closes the dungeon with beam soaks and a stacking ritual that decides the whole pull. He is also the only boss carrying the mount, so he is where the farm value sits.
| Order | Boss | Where | What the fight tests |
|---|---|---|---|
| 1 | Rav'i | Floor 1, the Carnage Pit (48.8, 79.2) | Breaking her feeding shield and denying Fresh Meat |
| 2 | The Writhing Coil | Floor 2, the Mutation Chambers (69.7, 51.7) | Splitting the boss and burning the snakes before they reform |
| 3 | Zul'jan | Floor 3, the altar chamber (45.9, 17.8) | Soaking the ritual beams and managing venom pools |
One map per floor, in the order you walk them.
Altar of Fangs is half a story. The other half is the raid it feeds into, where the creature Zul'jan is trying to free finally shows up as the final boss and the whole Ula'tek thread pays off. For the full picture of the patch around this dungeon, start with the overview and the raid page.
Rav'i is a three-headed hydra that has survived this cursed pit by scavenging whatever dies in it. The fight is a tug-of-war over food. She wants to reach a Carrion Pile and feed; you want to stop her — the second she starts feeding she becomes almost unkillable and grinds the group down. Everything else on the boss is movement around that core loop.
The Writhing Coil is a Child of Ula'tek, a knot of snakes bound into one body. It is the most interesting fight in the dungeon because the split only happens when the tethered players go and make it happen. Tethers pull it open, it scatters into individual snakes, and you get a short window to burn or crowd-control them before they fuse back together. Split it well and it ends fast. Handle it badly and a ramping raid-wide rattle catches up to you — and it does not stop climbing.
Zul'jan is the reason the dungeon exists. He has brought the Fang of Ula'tek back to the altar and is channeling the power to free the creature the raid ends on. Mechanically he is a soak fight bolted onto a spinning-axe dodge fight. The ritual is the part that decides your pull: leave it alone and the group melts under stacking Nature damage, so someone has to eat the beams. That trade is the whole encounter — soak now, or pay for it later.
No fight here changes shape. Rav'i and the Writhing Coil each pick up an ability that simply does not exist below Mythic, and Zul'jan keeps his kit but sharpens the one debuff that punishes bad soak order. Nothing is taken away to make room for any of it. All three additions hit the same group: the one that stands still and heals through the problem.
| Boss | What Mythic adds |
|---|---|
| Rav'i | Messy Eater — she flings meat chunks while she feeds, and every chunk nobody catches detonates into another Carrion Burst |
| The Writhing Coil | Spiteful Hunt — every Uncoiled Writhe fixates a player and applies Spiteful Venom if it reaches them |
| Zul'jan | Ritual Venom — the dormant soak debuff starts stacking, so two beams on one player land as one doubled burst |
Every drop, split by boss. Rav'i has the shortest list; the Writhing Coil and Zul'jan carry five armor pieces each, and both two-handers sit on the Coil. Zul'jan adds the bow, both daggers, a Tailoring pattern and the run's only mount. Item levels climb with difficulty, so the same piece is a Mythic 0 filler on launch week and a Mythic+ target once the season starts; our Mythic+ gear guide covers how those item levels scale with key difficulty.
| Slot | Item | Type |
|---|---|---|
| Chest | Primordial Robe of Rites | Cloth |
| Wrist | Hydra Scale Wristguards | |
| Feet | Poison-Proof Stompers | Plate |
| One-Hand | Venom-Etched Crescent | Axe |
| One-Hand | Hydraspine Twinblade | Warglaive |
| Trinket | Coiled Fangstone | Trinket |
| Trinket | Vile Vial of Volatile Venom | Trinket |
| Slot | Item | Type |
|---|---|---|
| Shoulder | Snakeskin Spaulders | Leather |
| Chest | Aged Interwoven Scaleplate | Plate |
| Legs | Leggings of Entwined Serpents | Cloth |
| Neck | Strand of Warding Fangs | Amulet |
| Off-Hand | Nocuous Focal Fang | Off-hand |
| Two-Hand | Vile Writhefang Glaive | Polearm |
| Two-Hand | Toxin-Coated Warstaff | Staff |
| Trinket | Knot of Writhing Serpents | Trinket |
| Slot | Item | Type |
|---|---|---|
| Mount | The Writhing Brood | Mount, account-wide |
| Head | Spare Speaker's Hood | Leather |
| Chest | Chestguard of Corroded Scales | |
| Hands | Handwraps of Blasphemous Rites | Cloth |
| Legs | Ancient General's Obsidian Pillars | Plate |
| Finger | Band of the Amani Warlord | Ring |
| One-Hand | Polished Lightwood Channeler | Dagger |
| One-Hand | Sharpened Lightwood Slasher | Dagger |
| Ranged | Ancestral Amani Recurve | Bow |
| Trinket | Tattered Amani War Banner | Trinket |
| Recipe | Pattern: Snakeskin Lining | Tailoring |
The Writhing Brood is the dungeon's headline drop, a serpent mount that comes off Zul'jan at a low rate, so farming it means killing him and rolling again. Run the farm on Mythic. The mount is expected to sit behind Mythic difficulty, and even if it does not, Mythic 0 and a key both drop it, so a Heroic farm is never the right call. Its own description hands the credit to the second boss, though: the serpents only yield after watching you tear the Writhing Coil apart.
Four trinkets drop across the three bosses, and only one of them is passive. Two of them turn the dungeon's venom into your own damage, one is a pure stat gamble, and the last is an Amani banner you plant on the floor.
Two weapons carry effects of their own, and Zul'jan drops both. They are the twin Lightwood daggers, and they split cleanly by role.
Every achievement here hangs on Zul'jan. The first three sit in the Midnight dungeon category and tick off as you climb difficulties. The last two are Feats of Strength, and one of them is the reason to care: Keystone Hero hands you Path of Venomous Evolution, the teleport to the door.
| Achievement | Requirement |
|---|---|
| Altar of Fangs | Defeat Zul'jan in Altar of Fangs. |
| Heroic: Altar of Fangs | Defeat Zul'jan on Heroic difficulty or higher. |
| Mythic: Altar of Fangs | Defeat Zul'jan on Mythic or Mythic Keystone difficulty. |
| Keystone Hero: Altar of Fangs | Complete the dungeon at Mythic Level 10 or higher, within the 29-minute limit. Rewards the teleport. |
| Keystone Victor: Altar of Fangs | Attain a region-best keystone completion for the dungeon. |
The ancient Amani sealed the Vaults of Atal'Utek here at the Altar of Fangs, and the Fang of Ula'tek is what they locked it with. Only that dagger reopens it. For most of the expansion the isle handled the problem on its own: anyone who came too close was pushed straight back out by the force coiled around it.
Zul'jan broke it anyway. Still held in the sway of the spirit of Hex Lord Malacrass, he carried the Fang back to the altar chasing lost Amani glory, and what he did along the way left his sister Zul'jarra wounded. He does not know that the dagger driving his ritual is the only thing that can still save her. So you go in after him alongside Orweyna and Lady Liadrin: push through Rav'i and the Writhing Coil, the hydra and serpent-brood the isle's venom has twisted, and reach Zul'jan mid-ritual. Killing him is not the end of it, though. Ula'tek surfaces as the final boss of the Venomous Abyss, which makes this dungeon the front door to the raid's whole story.
Three: Rav'i, The Writhing Coil, and Zul'jan, fought in that order, across the dungeon's four named areas. Short trash sections between them keep the run quick.
The dungeon opens with Patch 12.1 on August 11, and it already runs up to Mythic 0 that week. Mythic+ arrives a week later, when Midnight Season 2 starts on August 18, and that same day the dungeon takes its place in the eight-dungeon Season 2 keystone rotation. Keys run on a 29-minute timer.
Level 90. The dungeon sits at the Midnight cap, and you reach its entrance in the Vaults of Atal'Utek on the Coiled Isle through the Patch 12.1 campaign. Three surface gates lead into the Vaults; the dungeon door itself sits at 47.2, 67.6 once you are inside.
Yes. The Writhing Brood, a serpent mount, drops from the final boss Zul'jan at a low rate, and it is expected to sit behind Mythic difficulty, so farm it at Mythic 0 or inside a key rather than Heroic. Either way it means killing Zul'jan repeatedly.
Zul'jan asks the most of a group. His ritual beams have to be soaked on rotation or the whole party takes stacking Nature damage, and he layers ricocheting axes on top of the soak assignments. The Writhing Coil is the trickiest to execute, since the split window rewards clean burst and crowd control.