when a protoss power a ton of structures (cannons, shield bats, production or tech) with a singular pylon, making them all useless when the artosis pylon is sniped
it already got answered, and yes, it is indeed one pylon powering ALL the buildings! Back then Artosis (commentator) used to play in tournaments and there's a famous clip when all his production gets unpowered (~5 buildings) due to having 1 pylon only. Later they coined the term "Artosis Pylon"
