The authored depth ranges (D-148)
Floors
In the lore: The Tower §3 · Altitude transformation law §6 · Life inside the Tower §31
The Pressure begins at 60 s, dealing 8/s and rising 1.6 each second; fights end at 180 s at the latest. A crit deals ×1.5.
Range 1: The Lower Galleries
Floors 1–10Event tier 1Boss window 8–12
The Grazing Floor · Mite Drift · The Toll · Moth Lights · The Ridge · The Coiled Well
Range 2: The Cistern Stair
Floors 11–20Event tier 2Boss window 18–22
Held Line · The Picket · Reel and Rot · Nursery · Stilt Line · Counter-wall: The Glass Line · Swelling · The Cistern Mother
Range 3: The First Breach
Floors 21–30Event tier 3Boss window 28–32
Hungry Dark · Kiln Line · Cold Wading · Burst Field · Tick Nest · Counter-wall: The Swell · Under the Span · The Long Throat