"En taro Tassadar" comes from the StarCraft universe, where Protoss characters use it as a formal expression tied to Tassadar, one of the setting's most important figures. The phrase became familiar to players through Blizzard's games and spread online through game quotes, remixes and fan edits. It still gets used because even a very short clip carries strong worldbuilding: the voice, wording and tone immediately signal epic sci-fi drama to gamers, especially fans of classic RTS culture.