The clip is identified as coming from Dark Wildcard Vol 2, where it is tied to the Night Killer during its second phase. That framing explains its use online: rather than a generic animal noise, it is treated as a character-specific roar, so editors searching for that moment can drop the exact sound into their own videos. On soundboards it sits alongside other movie and meme roars, and it keeps getting reused because a phase-two roar gives creators a ready-made signal for escalation, danger and a villain becoming stronger.