Lions fly-half Johnny Sexton believes it would be "one of the greatest Lions performances" if they can secure Test series glory against world champions New Zealand.
The Lions' long and illustrious history is littered with memorable victories, but they now need successive wins in Wellington and Auckland to deny the All Blacks after losing last weekend's opening clash at Eden Park.
And Ireland star Sexton, who comes into the side to start at fly-half, with Owen Farrell moving to inside centre, has no doubt where the achievement would rank if they can turn things round.
"It's a huge challenge, but it's a huge opportunity as well," said Sexton.
"You don't get many chances to create history in your career, and to turn around a series like this, after going 1-0 down, would go down as one of the greatest Lions performances.
"We need to view it as an opportunity rather than as a daunting challenge. That is the view we are taking. We have got to go and attack them and give it our best and see where that takes us.
"We need a response, don't we? If you had seen the scoreline at the end of last week's game (the Lions lost 30-15), you would expect to see a totally different game when you went back and looked at the footage.
"But the way the All Blacks played and beat us was not how they have traditionally beaten teams over the last couple of years.
"They really took us on around the fringes, they stopped us at source, and gained a lot of momentum in and around the ruck and through the forwards.
"That is where we need to show our response, but they could come with a totally different game-plan this week, and we've got to be ready for that as well.
"If we can play to our potential and clean up some of the mistakes we made last week, and that discipline, I think we will be able to push them a lot closer and get the win."
Lions assistant coach Andy Farrell also fancies the tourists for an upset victory on Saturday.
"The underdog has always had his day, hasn't he?" said Farrell.
"When you get a squad together, it's powerful. I certainly wouldn't back against us.
"Everyone in this room understands the size of the task before we came here, how difficult it was going to be.
"But, I just see how the lads are preparing, and there is a sense of excitement about what a great game this could be."