Those missing from last year are Jared Payne, Joe Rokocoko, Aaron Bancroft, Winston Stanley, Luke McAlister, Stephen Brett, Chris Smylie, Toby Morland, Mat Luamanu, Sean Polwart, Kurtis Haiu, James King, John Afoa and Ash Dixon.
The 27-year-old Wulf returns after a season with Toulon in search of adding to his 46 Blues appearances and four All Black caps.
"I thought coming from Super rugby into Top 14, it was not the same level. The speed of the game there was not as quick," he said.
Wulf played on the wing and at fullback for Toulon, choices he would like to offer the Blues as well.
"I watched the Blues on television over there and sometimes wished I had been back playing in that group this year," he said. "I went over there when I missed out on Tri-Nations selection last year. I wasn't in the frame so it was time to give Toulon a shot."