Jurgen Klopp called it 'heavy metal football' and his right-hand man, Pep Lijnders, once had the phrase 'intensity is our identity' put up in lettering outside the dressing room at Anfield.
The old regime was famed for its breakneck, high-octane, bang-bang-bang style. It blew teams away, even last term when many would fancy their chances and be leading at Liverpool only to succumb to the quick one-two of goals and be losing before they could pause for thought.
Klopp's relentless style was the making of this team, who he turned from a laughing stock and sleeping giant to a behemoth of Europe once more ready to fight for the biggest prizes.