The Ospreys will run out to face Biarritz Olympique at Estadio Anoeta in San Sebastian on Saturday with Dan Biggar ready to boss the Welsh region's host of household names.
The 20-year-old outside half will be surrounded by a mass of British & Irish Lions, Welsh, Irish and Scottish internationals and a fair few All Blacks, but, once the whistle goes, Biggar will be the one running the show.
"I think the Lions and the All Blacks actually enjoy me bossing them around on the pitch - it is what this club has needed," said a young player with just two starts in four appearances for his country.
"The region needed an enforcer and to really push the lads on the field. Jerry Collins has said when he has been captain that No 9 and 10 need to boss you around the field and the forwards need to shut up and work hard.
"If our calls are wrong then we will get flagged up in the review on a Monday morning. But, at the time, the boys are brilliant, put their heads down and work hard for you and that has been successful for us this season."
The return to fitness of scrum half Mike Phillips - who missed the final four Pool stage matches with ankle damage - is a major boost for the Ospreys and his head-to-head with Dimitri Yachvili is set to be a fascinating contest.
"To have someone of Mike's quality back is only positive for us," said Biggar. "It's a privilege to play with someone like him, we played a few games together last season and about five or six this season.
"We have a real understanding on the field and a good camaraderie both on and off the field so we are very comfortable in each other's company. I don't mind him shouting at me and vice versa. He is brilliant to play alongside and have in the squad."
Biarritz have taken four previous Heineken Cup knock-out matches across the border into Spain and Biggar is expecting a similar welcome to the one the team received in ASM Clermont Auvergne.
"It looks like a great stadium in San Sebastian and we hope there will be a packed crowd in probably the biggest game of a lot of our careers," he said.
"We came away from Clermont disappointed by the result but we all felt we wanted to play in atmospheres like that every week. It was great to run out in front of a noisy crowd like that - it was incredible and a privilege to play there.
"It was as hostile and intimating as I have faced before kick-off and I remember there was a lot of booing as we ran out. I'm sure it will be similar against Biarritz. But we started well and that drained the atmosphere away a little bit, we tried to play rugby whereas a lot of teams go there to defend and get a bonus-point.
"They will have an advantage of having played there before but we will train there on the Friday to get used to it and I don't think it will be a problem - we will not use that as an excuse if we do lose and miss a few kicks. After all, it is still four sets of lines and two sets of goal posts.
"I don't have much experience of playing at football stadiums but and while the Ospreys have played at Vicarage Road and Edgeley Park before but nothing on this scale.
"That said, it would be just as exciting if we were playing at The Gnoll or wherever. It's a Heineken Cup quarter-final and an extremely exciting time for the region."