Darius Johnson has been on a mission, and his next task is helping UCF win a championship.Johnson has scored 73 total points over the past two contests. He’s aiming to deliver another high-octane outing when the Knights (20-16) face Nebraska (20-14) on Sunday in the College Basketball Crown championship game at Las Vegas.Johnson poured in a career-best 42 points in Saturday’s 104-98 overtime victory over Villanova in the semifinals. Two days earlier, he had 31 points in an 88-80 quarterfinal victory over Cincinnati.Overall, the senior guard is averaging 29.3 points in UCF’s three wins during the tournament. But he’ll trade each and every one of those for a banner.”We’re playing for a championship,” Johnson said. “… I want to go out the right way. We want to do something special before we all go our separate ways.”Johnson was a big-time spark in the win over Villanova. He knocked down the tying 3-point basket with 7.6 seconds left in regulation and then scored 10 points in overtime.There was zero chance of Johnson passing the ball late in regulation before hitting the big basket.”I was wide open for the stepback three, which is one of my go-to shots,” Johnson said, “so I was able to capitalize on that.”Nebraska reached the title game with a solid 79-69 victory over Boise State on Saturday.The Cornhuskers made a season-high 12 3-pointers while shooting a season-best 63.2 percent from 3-point range.Juwan Gary was 4-for-4 from 3-point range — tying his career high for makes — while producing 21 points and nine rebounds.