Rite of MajQa
The Rite of MajQa was a Klingon ritual that involved lengthy meditations in the Caves of No'Mat, where prolonged heat exposure leads to hallucinations. The ritual was generally undertaken for the first time at a young age. The participant in the ritual sought to gain a vision of his past or future; visions of family were considered particularly powerful and important. 

Worf undertook the Rite of MajQa as a youth when his foster parents arranged for him to travel to Qo'noS. ()

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Klingon ceremonies