Trial of Crippling Grief
Trial of Crippling Grief is one of the Trials of Ascendancy, and is found in The Chamber of Sins Level 2. It demonstrates Sawblades, which run along a set path, doing physical damage.
Upon completing the trial, Izaro gives the message "There is a fine line between consideration and hesitation. The former is wisdom, the latter is fear." and you are provided with a portal back to the entrance.