Chained among sulfur pools and skeletons in the under realm, Roman hears a flute command the eithrals and watches them fly upward through an opened steam vent. Realizing the bombing of Oath has begun, Roman struggles against his chains in panic and rage, then collapses in despair as he believes he is seeing the sun for the last time.

Elsewhere below, Iris leads Attie through the under realm using Enva’s instructions to follow downward-sloping floors. Iris leaves a trail of scone crumbs to mark their path and notices mineral clusters that may serve as markers. When the girls hear marching, they hide and watch Dacre’s soldiers moving through the tunnels, confirming Iris’s fear that Dacre plans to bombard the city first and then send troops out to seize survivors.

Iris unlocks a rune-marked door with Enva’s key, and the girls push through a thorn-choked passage to the boiling heart of the under realm. Following the sound of a flute and a pillar of sunlight, they approach Dacre while Iris prepares Enva’s sword and both girls stop their ears with wax so the flute’s magic will not affect them. Attie begins playing the enchanted violin, but Dacre senses them, attacks, and chases Attie. Iris tries to strike him and only cuts his hair. Dacre beats Iris down, pins her sword arm, summons the eithrals back, and reaches for her throat, putting Iris on the verge of death.

At that moment, Roman hears Attie’s violin from afar and is overcome by the lullaby’s magic, drifting into sleep despite his resistance. Near Dacre, Iris sees Enva appear across a sulfur creek in the form of a radiant bride. Dacre is transfixed and moves toward Enva, but Attie, still playing, signals Iris to wait. Iris realizes the wind affects everything except Enva, revealing that Enva is present through illusion rather than bodily form. As Dacre tries to strike Enva, Attie’s lullaby finally overtakes him, and he collapses asleep. The eithrals also fall from the air, crashing onto stone and into sulfur pools until the under realm grows still.

After removing the wax from her ears, Iris approaches Enva with Attie and discovers that her hand passes through the goddess’s body. Enva cannot speak, but she indicates Dacre. Understanding that this is the moment they came for, Iris looks down at the sleeping god, thinks of the damage he has caused, and brings Enva’s sword down on his neck. Dacre dies, his golden blood spilling across the stone, and Enva’s illusion fades into shadow as the pressure in the under realm changes.