Mage Armour comes from World of Warcraft, Blizzard Entertainment's long-running online fantasy game, where the mage class casts it as a protective self-buff. The short magical effect has become familiar to players through years of gameplay, dungeon runs and character preparation, and it later travelled beyond the game onto soundboards and gaming videos. Creators now use it as a quick shorthand for fantasy, spellcasting and preparation, because listeners who know the game recognise the sound instantly even without any visual context.