House Greyjoy rules the Iron Islands in George R. R. Martin's A Song of Ice and Fire and its television adaptation Game of Thrones, where the Ironborn are known as fierce seafaring raiders. Their house words, What is dead may never die, capture that grim, relentless identity, and battle shouts linked to the family have become shorthand for an Ironborn charge in fan edits. The short clip spread through Game of Thrones compilations and gaming videos, where its raw aggression fits raids, invasions and last-stand moments.