Structures
Six kinds of structure stand in the Swift, besides the arrival gates. Their creatures appear once, when the structure is built, and never come back.
Arrival gate

A reinforced deepslate portal set into a mound of red swiftstone and teal moss, created the first time you arrive, with a paved landing and two terraces stepping down in front of it. Four dormant echo golems stand guard on the terraces, facing away from the gate. It links back to the portal you came through.
| Found in | Wherever you arrive through a Deep Dark portal |
|---|---|
| Inhabitants | Four dormant echo golems |
Lullaby Circle

A ring of five dormant echo golems around a raised dais of chiseled swiftstone with a Soul Block on top. During Thrive, play a note block nearby and the whole circle wakes up.
| Found in | Singer’s Meadow and Lullaby Hills; common |
|---|---|
| Inhabitants | Five dormant echo golems |
| Loot | The Soul Block on the dais |
Sculker Nest

Where the sculkers live under their Monarch. A stairway opens in a ravine floor under a tidestone arch crowned with bone and leads down into a domed chamber: a dark floor with pools of ichor, red ledges round the edge, Soul Blocks glowing in the dome, and the Monarch’s throne. The Monarch and three stalkers wait inside, with two tuners the sculkers keep.
Echo Den

A ruined courtyard of red swiftstone brick, crenellated and breached in two places, with a chiseled gate, four dark tidestone towers and a Soul Block shrine. Echo golems keep it: three awake in the courtyard and one asleep by the shrine. Illagers have camped before the gate with tents and a campfire, and the golems and the illagers fight.
| Found in | Humbler Huskland; rare |
|---|---|
| Inhabitants | Four echo golems (one asleep), two pillagers and two vindicators |
| Loot | The illagers’ chest of stolen goods: 2–6 emeralds, 6–14 arrows, a Soul Block taken from the golems, bread, and sometimes a crossbow |
Humbler husk

The giant skull of a humbler, half sunk in the sand and grown over with tidestone and moss. Its face has eye sockets and a bone-framed doorway. Inside, bone ribs arch over a sandy floor, shroomlights glow in the crown, and a chest waits on a bone dais.
| Found in | Humbler Huskland; common |
|---|---|
| Inhabitants | None |
| Loot | The chest: 4–9 bone meal, 2–4 sifter scales, 2–4 golden carrots, a Soul Block, 1–2 echo shards, and half the time some glistering melon |
Illager Soul Excavation

An illager camp mining the Swift for its souls: a pit of Soul Blocks, tents, a campfire, barrels and a supply chest, kept by a band of illagers.
| Found in | Singer’s Meadow, the Wild Meadows, Sifter Canyon and Lullaby Hills; uncommon |
|---|---|
| Inhabitants | Two vindicators and three pillagers |
| Loot | Soul Blocks in the pit. The chest holds 1–3 Soul Blocks, 3–8 emeralds, 8–16 arrows, 2–5 iron ingots, 1–3 sifter scales and 4 bread, sometimes a crossbow, and rarely the Lullaby music disc |
Dartback Arena

A basin sunk behind a red swiftstone wall: a tidestone floor around a raised dais, a moat of ichor crossed by four causeways, three pools of ichor and amethyst on the rim. Its Dartback calls a stalker and a scavenger to the fight.