Raiment of Sorrows
The Raiment of Sorrows is a shroud-like raiment that was handwoven by the Sisters of the Order of Lamentations and then allowed to sit in state at the foot of the Golden Throne for a full century. It later came into the Adeptus Custodes' possession and is now a relic that serves as a potent reminder of their failure to protect the Emperor during the Battle of Terra. Now, being in the Raiment of Sorrows' presence fills them with a cold determination to never fail in their sacred duty again. The Raiment of Sorrows can be worn into battle and any dying Custodes near it can draw strength from the relic, in order to deliver one final blow against the Emperor's enemies.