Trey Alexander made two free throws with 1.9 seconds left for Creighton, which will play for the title Wednesday against either No.
Ryan Kalkbrenner scored 21 points, Baylor Scheierman 20 and Alexander 12 for the Bluejays, who had a 12-point lead late in the first half.
Kalkbrenner made a reverse jam with 1:20 left to give the Bluejays the lead for good at 83-81.
After Scheierman made two free throws for an 87-84 lead with 16 seconds left, Council missed a corner 3 and Nembhard rebounded and was fouled.
Creighton ran to a 12-point lead with 1:43 to go in the first half before the Razorbacks closed with a 6-0 run, capped by Trevon Brazile's thunderous dunk on an alley-oop pass from Anthony Black.
Creighton: The Bluejays' free-flowing offense produced three players in double digits by halftime: Nembhard with 13 points, Scheierman 11 and Kalkbrenner 10.
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