Arx Corinium
A flooded Imperial fort overrun by lamias. Three bosses (Ganakton the Tempest, Sliklenia the Songstress, Sellistrix the Lamia Queen) and three minibosses. Sellistrix's island-and-water arena is the only real puzzle.
- Ancient Lurcher (last miniboss): tank faces it away and blocks its slams. Step out of its pollen cloud; the green beam (Primal Fire) can't be avoided, so heal through it.
- Hard mode: veteran only, read the Scroll of Glorious Battle before Sellistrix. A full wipe turns it off.
Fanged Menace
Miniboss- Poison Cloud: the snake curls up and a big green circle appears. Get out. Anyone standing in it heals the boss a lot.
- Face it away (tail Lash is a wide red cone, stagger). Block Kiss of Poison (heavy).
- Interrupt lamia screams if adds are up.
- Giant snake. Coiled up with a large green circle around it = Poison Cloud.
More detail
Easy if nobody stands in the poison. Groups that do can undo their damage and drag the fight out.
- Xynode says the room is full of lamia adds and the poison heals the boss for about 5% HP per second. UESP mentions neither the adds nor a number, just 'very large amounts'.
Ganakton the Tempest
BossEasy wamasu. Hold him still and stay behind him.
- Face him away from the group: Shocking Breath is a channeled frontal cone. Block it.
- If a player is pinned by a lightning bolt (Trapping Bolt), break free; Xynode says another player can free them via synergy.
- Don't stand too close in front: Lightning Spit is a fast whirl that stuns.
- Keep HoTs up. Shed Lightning is unavoidable group-wide damage.
- Large wamasu. Lightning cone from its mouth; a fast-moving lightning whirl toward a player.
More detail
Easy wamasu. Keep it facing away and heal through the passive lightning damage.
- Xynode says the pin needs another player's synergy and rarely appears in fast groups. UESP says the pinned player can break free.
Sliklenia the Songstress
Boss- DON'T kill her snake. When she says 'Hide from my song, my pet', the snake runs off and makes a bubble. Everyone gets in the bubble for her scream (Cacophony). No snake, no bubble, wipe.
- Taunt Sliklenia only. Face her away and block Venomous Bite (heavy, knockback).
- Single-target her. No AoE that hits the snake.
- Lamia with a large pet snake. Snake coiled with a dome around it = go inside.
More detail
Breaks the 'kill adds first' rule. Each scream phase: find the snake's dome, wait inside (you can still hit her from in there), come back out.
Matron Ixniaa
Miniboss- Bolt Ballistae: two concentric red circles on a random player. The inner circle hits hard and stuns: get out of the middle. Spread so it only catches one person.
- Block her heavy. Keep her mid-room so people can spread.
- Kill her handmaidens. Ignore the Spectral Lamia: lots of health, little damage.
- Lamia matron with handmaidens. Small red circle inside a bigger one = lightning strike.
More detail
Spread out and never stand in the inner lightning circle. The outer ring hurts but is survivable.
Sellistrix the Lamia Queen
Final boss- Lightning Bulwark: if she stands in the water, the water is electrified. Stay on the islands while she is in the water.
- Bolt Discharge: debris falls on the islands (red circles). Step into the water until it ends, then back onto the island. Not if she is in the water too.
- Hold her on an island, facing away. Piercing Shriek is a red frontal cone (stagger).
- She drops taunt at times and runs to a random player (New Target). Re-grab her before she wanders into the water.
- Stay on her island, close behind her, so her random chase doesn't drag her into the water.
- Arena of lit islands and dark water. Sparks on the water = electrified. Red circles on the islands = falling debris.
- Experienced groups park her in the water (group on dry land). That removes her damage shield, but any mistake electrocutes people.
Activate: Veteran only. Read the Scroll of Glorious Battle before engaging her. A full wipe turns it off (achievement 'Snake Skinner').
- More health and more damage. A missed block or dropped taunt is much more punishing.
More detail
On land she has a damage shield; in the water she loses it but electrifies the water. Standard method: everyone on her island, hop into the water only for Bolt Discharge.
- Xynode says on HM her lightning mechanics (scream, channeled strikes) also happen more often. UESP's achievement page only lists more health and damage.
- Scroll location: Xynode says on the ground before the encounter. UESP's general rule agrees (floor near the final arena).