The line comes from the French dub of Yu-Gi-Oh, the anime built around a trading card game in which players summon monsters and battle through duels. 'It's time to duel' became the show's signature call to battle, repeated at the start of almost every match and instantly recognisable to fans. French-speaking viewers kept the dubbed version alive through clips, soundboards and edits, including playful stretched versions that repeat the start of 'duel'. It endures because it turns any contest into a formal, high-stakes confrontation in just a few seconds.