Mystical Seven chooses seven outstanding seniors for membership based on their good deeds and selfless leadership and service to the campus and community.

Mary Chorn Hazard was admitted due to her exceptional record of student activities and stout sponsorship by J. Craig Ruby, who was also a member of M7 as well as Phi Kappa Psi.

[3][4] In 1929, Mizzou athletic director Chester M. Brewer, along with the Mystical Seven, began the tradition of smoking the Tiger–Sooner Peace Pipe at halftime of the annual Missouri–Oklahoma football game.

The pipe had belonged to Chief White Eagle of the Pawnee tribe, and it was believed to be at least 100 years old at the time it was donated.

Oklahoma's athletic director, Joe Castiglione, was quoted as promising to look for the missing peace pipe.