David Fifita said he "couldn't leave" Wakefield Trinity and stated his determination to bring silverware to the club after signing a three-year contract extension.
Powerhouse prop Fifita, the leader in Super League's Man of Steel rankings after a superb start to the season, is now committed to Wakefield until 2022.
The news marks a huge coup for Trinity, whose chief executive Michael Carter said: "It's a real statement of intent of where we want to be. I'd say this is one of the biggest deals in the club's history."
Explaining his reasons for staying with the team he joined in 2016, Fifita added: "I just couldn't leave Wakefield. For what they've given me and what the fans have given me, I just want to give something back to them. My goal now is to bring a trophy to this club.
"The bond between the players is something I've never had with any other club."
Wakefield finished fifth in Super League in 2018 and are fourth in this year's table, having made significant progress under head coach Chris Chester.
"All this talk we're a second-tier team, it really hurts and I do want to be a part of the team that changes that," Fifita - the twin brother of Cronulla Sharks prop Andrew Fifita - told BBC Radio Leeds.
"We don't want to be looked at as a little club. Leeds and Saints [St Helens] and all of those bigger clubs - yeah, they might have won some championships but times are changing and Wakefield are really standing up. We don't have the best facilities and stuff like that, but I think it drives us to be tighter as a group."
Hull FC scrum-half Marc Sneyd, named man of the match in successive Challenge Cup finals in 2016 and 2017, also signed a three-year contract extension on Tuesday.