A circular basalt chamber hangs in a hush that feels more like a held breath than silence. Fine gray grit drifts sideways before settling, and a pale stone tooth rests in a floor socket beneath three waist-high controls. A dim amber glow leaks from a sealed alcove in the wall. Every few moments a low bell sounds; the grit lifts, the tooth rises, then both return to their starting places as though the room has quietly changed its mind.
You step into a round basalt chamber where gray grit drifts sideways through still air. A pale stone tooth rests in a floor socket beneath three carved controls. Somewhere behind the wall, a low bell sounds, and the grit begins to move.
Show the inscription and read its three lines aloud. On each bell, describe the tooth's state clearly: buried, upright, then settled flat beneath dust. The controls remain usable throughout the loop, and the party remembers each repetition.
Let the players observe a full cycle before pressing for a choice. If they are stuck after a cycle or two, point out that the inscription describes changes in order. The loop is pressure, not a real-time deadline; escalate only through sensory unease, not by rushing the table.
A circular basalt chamber hangs in a hush that feels more like a held breath than silence. Fine gray grit drifts sideways before settling, and a pale stone tooth rests in a floor socket beneath three waist-high controls. A dim amber glow leaks from a sealed alcove in the wall. Every few moments a low bell sounds; the grit lifts, the tooth rises, then both return to their starting places as though the room has quietly changed its mind.
The party can see the tooth, the three marked controls, and the inscription immediately. Watching one full cycle reveals that the chamber repeats three states while the characters retain their memories.
Inscription around the chamber
First, the tooth sleeps under the unremembering dust.
Then, the buried point stands and drinks the hollow air.
Last, it lies in its ring, and dust comes home.
Three controls are carved beneath the inscription: a stone beneath dust, a stone standing upright, and a stone lying flat in a ring.
The loop has three bell intervals, each taking about a minute in the fiction. At the start of each interval, describe the tooth's state and sound the bell; a character can then use one of the three controls before the next bell. The party must use one different control per interval, in the same order that the inscription describes the tooth's states: buried, upright, settled. If they use a control too early, repeat one, or miss an interval, the chamber resets at the third bell. The tooth's changing position, the control carvings, and the inscription provide all necessary information; checks can clarify but are not required. On a correct sequence, the controls hum in harmony and the alcove opens.
The first bell sounds when a creature enters the circular chamber. The loop begins immediately, and the controls become active at the next bell.
| DC | Check | What it gives |
|---|---|---|
| 13 | Intelligence (Investigation) | Notice the three control marks correspond to the tooth's three visible states and that one control is meant to be used on each bell. |
| 13 | Intelligence (Arcana) | Recognize that the room resets its physical state at the bell while retaining the party's memories, and that the regulator responds to a completed sequence. |
| 12 | Wisdom (Perception) | Hear the three distinct bells and notice the tooth's position change at each one. |
No hint given yet.
The three controls ring like struck crystal. The grit falls still, the tooth remains settled in its socket, and a seam opens in the alcove. Inside rests the ley line regulator, cool and heavy, its amber veins pulsing in time with a deep vibration under the floor.
The chamber resets to the first bell, returning the tooth and controls to their starting states. A pulse of harmless but unsettling stone-dust washes over the room. The party keeps its memories and any notes, so it can try again. After three failed cycles, the regulator's glow dims and the next attempt begins with the first control's mark briefly illuminated.
The geomancer-priests of the Silted Gate built this chamber where a ley line brushed the Elemental Plane of Earth. They needed a way to test whether a keeper understood the cycle of a buried stone before allowing them to carry the ley regulator away. Their device did not measure strength or loyalty, but the order in which a stone was hidden, raised, and returned. When the priests vanished, the regulator continued to hold the chamber in its final test, repeating the same brief interval.
For a less experienced group, make the three control marks unusually distinct and have the first correct control glow after the first reset. For a more experienced group, keep the same fair clues but allow the loop to include a changing harmless distraction, such as a brief tremor, without altering the true sequence.
Keep the loop consistent and legible: the tooth always follows the same three states, and the party always remembers. Do not hide essential information behind checks. Checks clarify the mechanism or the reset, while observation and discussion are enough to solve it.
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