Squeaking Floors

Squeaking Floors
Transmutation
Level Cle 3
Components V, S, M
Casting Time 1 action
Range Medium (100ft + 10ft/level)
Area Of Effect 10ft square/level
Duration 1 hour/level

A surface affected by Squeaking Floors squeaks loudly when any creature larger than a normal rat (larger than one-half cubic foot or weighing more than three pounds) steps on it or touches it. This spell gives a -20 circumstance penalty to Move Silently checks. Rogues may treat this spell as a magical trap.

The squeaks can be heard in a 100 ft radius, regardless of interposing barriers such as walls and doors. The squeaks occur regardless of the surface, whether wood, stone, dirt, or any other solid material. Listeners automatically know the direction of the sounds. Those able to fly or otherwise avoid direct contact with the affected surface will not activate Squeaking Floors.

Material Component: a rusty iron hinge that squeaks when moved

This spell was originally from the 2e Tome of Magic