Underworks
The Underworks is a lava-filled industrial Silksong region beneath the Choral Chambers, home to the Twelfth Architect.
- Biome
- Underworks
- Act
- Act 2
- Type
- Main region
The Underworks is a lava-filled industrial region beneath the Choral Chambers, the Citadel's churning machine underbelly. It contains the Cauldron sub-zone, the route to the Clawline harpoon upgrade, and the Twelfth Architect who repairs tools and sells the Architect's Key for the Architect Crest. It is one of Act 2's most hazardous stretches. Mastering Clawline here unlocks paths across the rest of the kingdom.
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