The Mauk-to'Vor was a Klingon ritual that allowed a Klingon to kill a wrongfully disgraced sibling to restore their honor in the afterlife and ensure their entry into Sto-vo-kor. The ritual required adanji incense and was carried out when one sibling plunged a mevak dagger into the other's chest.
Kurn requested that Worf perform the Mauk-to'Vor in 2372, though the ritual was interrupted by Odo and Jadzia Dax and Kurn was revived by Julian Bashir. Though initially angered by the interruption, Worf later came to agree with Benjamin Sisko that the ritual was no different than committing murder and decided not to carry it out. (DS9: "Sons of Mogh")