The Dagger of Initiation is a cult encounter. It first appeared in the Miskatonic Horror expansion.
"Either we will have your friends' loyalties or we will have your blood."
If all investigators have a "One of the Thousand" Cult Membership, you are Blessed.
Otherwise, you must choose another investigator who may choose to draw a Corruption card and gain a "One of the Thousand" Cult Membership. If he does not, you lose 2 Stamina.