Arthas Menethil is one of Warcraft's most recognisable villains, a prince whose fall and transformation into the Lich King made him a lasting figure in gaming culture. The joke here borrows that dramatic history and reduces it to a blunt, misspelled farewell, the kind of low-effort tribute that spreads easily in gaming clips and streams. It works because viewers already know Arthas, so no setup is needed, and it still appears in edits whenever a dramatic defeat deserves an ironic send-off rather than a serious reaction.