Divine Shield comes from World of Warcraft, Blizzard's MMORPG released in 2004, where it is one of the Paladin class's most recognisable spells. Players nicknamed it the bubble because casting it surrounds the character in a golden sphere that grants temporary immunity. The sound became shorthand in WoW videos, PvP montages and forum jokes about Paladins escaping certain death. As gaming clips spread to YouTube and Twitch, the activation chime kept that meaning, so audiences recognise protection and a smug escape even without seeing the game.