We have a helluva lot of young players wanting to become Super players who will announce themselves to the world on Saturday
The Barbarians squad were training earlier in the day at Marist RFC Park in what was their third day together as a squad.
Matich said the squad is in great spirits ahead of the enormous fixture.
"We're feeling pretty positive. Obviously we've identified the Lions have a strong scrum, but we're definitely not going in like we are going to lose in that area," he said.
"We're New Zealand rugby players, every New Zealand team has that winning mentality built in," he said.
"We're not going out there to come off second best but we're well aware of the challenges we face with the calibre of players that are coming.
"We've got a great bunch of guys in our group. We have a couple of experienced guys who have been at the Super level and we have a helluva lot of young players wanting to become Super players who will announce themselves to the world on Saturday."
Randle said the excitement was bubbling within the unit and they were wary of overplaying their hand.
"We're just trying to throw a simple plan together, trying to not complicate things.
"There are challenges with not spending a heap of time together but we knew that going in so it's not really something we've spoken about other than when we first came together.
"We'll just try to keep things simple but throw in a bit innovation.
"It's been a long time coming; we've been in preparation for months as a group.