Scylla and the Sirens

The second descent boss, a sea monster fronting a siren band, fought three against one in the watery region of Oceanus.

Scylla and the Sirens is the second boss of the descent and the gate at the bottom of Oceanus, the watery region below Erebus. It is not a duel. You face the sea monster Scylla backed by two siren bandmates, a guitarist and a drummer, so the encounter plays as three against one. The theme is a concert, and the fight is built around managing more threats than you can watch at once.

The fight

Scylla fronts the band while her two siren bandmates support her from their own positions in the arena. Because there are three of them, attacks come from multiple angles, and the bandmates keep pressure on you while Scylla works. The Unseen Update added new Scylla songs, so the encounter has multiple performance sets rather than a single fixed loop. The core problem is target priority: you cannot face all three at once, so you have to decide who to pressure and who to dodge while the others hammer your flanks.

Treat this as a crowd fight, not a boss duel. If you fixate on Scylla and ignore the bandmates, their fire from the sides will whittle you down while you are committed to a single target.

How to approach it

Positioning beats raw damage here. Use Sprint to keep all three roughly in front of you instead of letting one drift behind your back, and lean on a weapon or build that can hit more than one target, so chip damage spreads while you focus a primary. This is a good fight for an area-leaning damage engine, for example Apollo’s Daze for the wide reach or Hera’s Hitch to spread damage across the group. Save your Magick and Omega for clean windows when the band is grouped, and avoid channeling a slow Omega cast when you have lost track of one of the sirens.

What makes it hard

The difficulty is attention, not any one mechanic. Three sources of pressure split your focus, and the moment you commit fully to one, the other two punish you. New songs change the timing you thought you had learned, so muscle memory carries you less far than it does on a single-pattern boss. It is the run’s first real test of whether your build can deal with a crowd rather than just a single fat health bar.

What beating it means

Past Scylla lies the Fields of Mourning and its Glassrock, a weapon reagent, so clearing her is both a progression step and a supply run. She sits in the middle of the descent ladder, the bridge between the projectile-reading lesson of Hecate and the raw-aggression test of Cerberus. Beating her reliably means your build can hold up when the arena has more than one thing trying to kill you.