The Rite of Ascension was a ritual performed when a Klingon child who had reached the Age of Inclusion symbolically became a warrior. It was required to be followed by the Second Rite of Ascension in less than ten years in order for the Klingon to fully become a warrior. The rite involved the repeated use of painstiks to test the warrior's endurance and resolve. (TNG: "Firstborn")

Worf underwent his Second Rite of Ascension in 2365. (TNG: "The Icarus Factor")