Brandon Costin's last game for the Bulls will be the biggest of his career.

Following last Saturday's NFP Grand Final victory by Huddersfield against Leigh, the Aussie centre is now definitely heading to the Giants next season, but wants to sign off for Bradford in style.

"This will be the biggest game of my career," said Costin, whose return to his former club was dependent on their instant return to Super League.

"It is the ultimate for any player. It will be my first senior Grand Final and I don't think I have played in front of this many people before.

"It is the culmination of a long, hard season and everything comes down to this 80 minutes. It is going to be very exciting. It will be nice to end my time here with a gold ring - I'm not going to Old Trafford to lose."

Costin, who has played stand-off and centre this year for the Bulls, has been hit by injuries this year but has still earned rave reviews for his performances.

He has scored eight tries in his 19 appearances this season since joining from the relegated Giants last term.

The versatile Australian, who has also played for Canberra in the NRL, has already been to a Grand Final this season, watching his future team-mates defeat Leigh at Widnes. "Even when Leigh went ahead I never thought we'd lose," said Costin, the use of 'we' showing his close affinity to a club he never really wanted to leave.

"They were always going to win and it was good to see them get through and I am looking forward to joining for next year.

"I'm glad the club have bounced straight back into Super League and I can't wait to link up with them again."

But 30-year-old Costin, who became a world champion two games into his Bulls career, will be sad to go. "When you play for a team, you do form some good friendships," he added