Unai Emery brought up 200 matches as Aston Villa manager against Hull City. The responsibilities and pressures have only become greater. No Premier League manager has more power at their club. Villa has been crafted and shaped in his image, the hierarchy so enthused they gave him “the keys to the castle.”Such deep conviction has been vindicated. On Tuesday, Villa start their second Champions League campaign in three seasons. They won the Europa League in May. Villa’s owners want Emery to build a dynasty, to have the longevity associated with Arsene Wenger or Sir Alex Ferguson. A manager only achieves that by guiding a team through periods of transition. They are usually more gradual and less acute than Villa’s.Perhaps with Pep Guardiola no longer in Manchester, Emery is the Premier League’s most accomplished manager.His name is sung before every match and often at full-time too. He is a deity among supporters. In the summer’s flux, he was increasingly Villa’s windshield, who could hold everything down while his castle changes, brick by brick.Emery is the reason why, despite the team’s spine ripped out, fans are mostly enthralled, not panicked, by the idea of him leading their club into a new era. That is pressure. Shiny new signings excite, but having key players picked off within a matter of months is inherently daunting.“We must be patient, and we should understand that we are rebuilding the team,” Emery said on Saturday evening. “Now they must get our way and demands, keeping the same mentality that we built, but with different players.”Emery has been invigorated by the challenge, even if he was surprised by just how many of his long-standing lieutenants, including backroom staff, walked out the front door. He needs a new stimulus to be as relentless and this is his next challenge.Following the goalless draw at Hull City, leaving Villa with one point from the opening three matches and without a goal, it is not too early to reckon that Villa’s success this season hinges on Emery. The question is how he integrates 10 summer additions and compensates for the losses of significant players.“You’ve got to adapt quickly,” Matty Cash told The Athletic afterwards. “The manager said it: we’ve got experienced players that have played for him for a long time, so we need to take them (new signings) on our back and show them the way and adapt to their qualities.