Each team has one player who can turn a game on its head and secure victory with an amazing play, and for the Storm that X-Factor is Billy Slater.
To celebrate the finals, NRL.com has launched a new NRL X-Factors application, where fans can vote on their favourite X-Factor in a head-to-head battle.
Check out the best moments of Slater's NRL career and cast your vote on our new X-Factors page.
Slater's Top 10 Moments:1. Round 1, 2003
Announces himself as a superstar of the future with a dazzling 60-metre run to score on debut with just his sixth touch in the top grade. His try sparks a stunning Melbourne comeback as they prevail 36-32 after trailing 22-0.
2. Round 11, 2003
Slater plays a key role in Melbourne’s thrilling 12-10 win, pulling off a miracle try-saving tackle to deny Adam Dykes a certain four-pointer then winning a penalty in the final seconds to give Cameron Smith the chance to slot the winning goal.
3. Round 16, 2004
Slater scores a stunning solo try after fielding a Warriors kick near his own try-line and beating two defenders to race away before embarrassing fullback Brent Webb with an unlikely dummy to score a memorable try. Melbourne win 42-6.
4. Finals Week 1, 2004
Produces three huge plays as the Storm come from behind to upset Brisbane 31-14. He begins by setting up a try for Matt King with a bullet pass, pulls off a try-saving tackle on a runaway Darren Lockyer, then scores a try of his own to propel Melbourne to victory.
5. Round 18, 2006
Slater creates a magical try out of nothing, beating half a dozen players in a scything run before offloading for Steve Turner to score as the Storm win a thriller 10-4. Slater also produces two crucial tackles to deny Darius Boyd and Brent Tate try-scoring opportunities.
6. Finals Week 1, 2006
Leading 12-6 with three minutes to play, Slater produces a wonderful cover tackle on runaway Eels back-rower Brett Delaney to secure victory for his side and eliminate Parramatta from the finals race.
7. Finals Week 2, 2008
Pulls off a miraculous tackle to hold up a try-bound Ben Hannant with just three minutes remaining, paving the way for Melbourne to steal a stunning 16-14 victory when Greg Inglis scores with the final play of the game.
8. Finals Week 1, 2009
Slater becomes just the fourth man in 50 years to score four tries in a finals match as Melbourne thrash Manly 40-12 in their qualifying final at Etihad Stadium. Slater crosses twice in the first half and has his hat-trick by the 44th minute before sealing his place in the record books in the final minutes.
9. Grand Final, 2009
Scores a try in the decider after backing up an Adam Blair bust in the 55th minute, extending Melbourne’s lead to 22-6 and ending hopes of an Eels comeback.
10. Round 3, 2012
Scores a miraculous try against the Titans with eight minutes remaining – coming from the clouds to haul in a Cameron Smith cross-field kick and somehow ground the ball inches before sliding over the dead-ball line. It completes his third consecutive try-double to start the year and also sees him become the most prolific fullback of all-time with 130 career tries.