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Snake Hatch

th tier (
(less than 1 hour)

A 1-foot-tall stone door has no visible means of opening it.

A lever in a different room, possibly the next room the party explores, opens and closes the stone hatch with a grinding sound that’s audible for 100 feet. When the hatch opens, a giant constrictor snake slips out and begins stealthily hunting. This trap might be triggered by creatures in the next room while the adventurers are near the hatch, or the adventurers might find the lever and release the hungry snake themselves. In either case, they are likely to be its first choice of prey.

The alcove behind the hatch may hold a Minor Treasure.

Possible Solutions
  • An Engineering check in the hatch room, or an examination of the stone hatch, reveals no opening or closing mechanism nearby. A Perception or Survival check in the hatch room, or an examination of the floor, reveals traces of the monster (such as tracks or odd smells) near the hatch.
  • Forcing open the hatch requires a DC 20 Strength check. It is an object with AC 20, 40 hit points, and immunity to poison and psychic damage. Blocking the hatch with a heavy object prevents the monster from emerging.
  • An Engineering check in the lever room, or an examination of the lever, suggests that such levers are often used to operate counterweight doors or similar mechanisms. A creature can make a thieves’ tools check to disable the mechanism.