He’s already at another level, but superstar fullback Israel Folau is hoping to raise his game to impossible new heights in the NSW Waratahs’ do-or-die Super Rugby semi-final against the Brumbies on Saturday night.

Folau is the competition’s leading tryscorer and most marked man, but says he’s saving his best for the business end of the season.

The code-hopping freak last tasted finals football with the Brisbane Broncos in the NRL back in 2009 and is jumping out of his skin ahead of his return to the sudden-death pressure cooker at Allianz Stadium.

“As a player, when I was a young kid, you always wanted to play in those big games,” Folau said on Tuesday.

“There’s nothing better than going out there and performing at your best and that’s what every player wants to do.

“You want to give 150 per cent on big games and that’s what I enjoy.

“I look at it as something you train so hard for and that’s the fun part about it – when you go out and play the game.”

The freakish fullback missed the Waratahs’ last-up thrashing of the Queensland Reds with a corked thigh, but insists he’s back to 100 per cent for the Brumbies showdown.

“The body’s feeling fresh and I’m ready to go,” he said.

Coach Michael Cheika is backing his attacking wonder to walk the walk against the Waratahs’ arch rivals.

“He’s obviously a good player and one of the hallmarks of good players is when the big days are on, they’re there,” Cheika said.

“More often than not, if you have a look at Israel since he’s come to rugby union, when he’s been required by either us or by Australia, with only one year and a bit’s experience in the game, he’s stood up and delivered.”