During a poker match between Dorsi, Roger, and Jack Sparrow, Dorsi and Roger conspired together to cheat Jack out of his Piece of eight, but Sparrow turned the tables on them and won anyway. After this Jolly Roger believed Dorsi had betrayed him and shot him dead. In his final living moments, the witch doctor invoked a vindictive spell on his slayer. Legend has it that the evil curse doomed Jolly Roger to walk the Earth as the undead. As the shaman's body dissipated into dust, Jolly Roger inherited the all-powerful Voodoo from him, and so became the abomination that would terrorize the Caribbean in the following years.