The Seven Saviors created the obelisk:
Savior One was the first to contact THE OBELISK, they were the one who brought the other six together.
Savior Two located the cave as a housing for the obelisk.
Savior Three expanded the cave.
Savior Four gathered the physical materials to build the obelisk
Savior Five gathered the knowledge
Savior Six tried to betray and was became the sacrifice
Savior Seven sacrificed Savior Six and ascended in the process