The concept of needing the hair of those with the darkest souls in the realm is such a missed opportunity.
Not only are these people relatively unknown figures, we never get an explanation of who they are or what makes them qualified to be the darkest souls. Especially considering that OUAT has a ton of great villains who would better be standing up there to offer up their hair.
It would have been nice if, for example, we would have seen Regina taking the hair by force from all the other villains we know or would come to know. She would have to make a deal to get a lock from Rumpel. After her duel with Maleficent, she would snatch a lock of hair. In season 2, we would see her get a lock from Cora’s body (whom she thought was dead at the time) after sending hook to kill her. She could have told Hansel and Gretel to get a lock from the blind witch.
Like, this could have been done better.
"I could have the giant duck as my steed!" --Daniel Radcliffe
Keeper Of Tamara's Taser , Jafar's Staff, Kitsis’s Glasses , Ariel’s Tail, Dopey's Hat , Peter Pan’s Shadow, Outfit, & Pied Cloak,Red Queen's Castle, White Rabbit's Power To World Hop, Zelena's BroomStick, & ALL MAGIC