In 3963 BBY, Jarael, Dob and Del Moomo, Zayne Carrick and Marn Hierogryph infiltrated the Sanctum in an attempt to uncover evidence of the Jedi Covenant's wrongdoing and take this evidence to the Jedi Council. Carrick and Hierogryph discovered that the Helm of Dathka Graush was being tested on in the Sanctum, influencing weather in a six kilometer radius of the site. Considering this to be the evidence they needed, Carrick and Hierogryph left the Sanctum but were apprehended by the Feeorin shortly afterward.