Trial of Crippling Grief
Trial of Piercing Truth is one of the Trials of Ascendancy, and is found in The Lower Prison. 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.