Blade trap

Version 0.15: This article may not be up to date for the latest stable release of Crawl.

You can see the edge of a massive scythe-like blade hidden in a slit; it probably has a counterweight that acts as a pendulum.

A blade trap is a trap which, when stepped on, causes a huge blade to swing up and slice you, causing 48 - 76 physical damage to you if it hits (monsters take only 10 - 38). It is the most powerful of all the mechanical traps, and well worth being cautious around.

Flying characters will never trigger them.