I'm not so sure about that, bbblp.
I heard somewhere that the Medallion contains the souls of all the previous Lin Kuei grandmasters after they die (which would explain why Sektor's father's soul flew into the Medallion after he was slain).
Sektor is a soulless cyborg, so unless he dies, he has nothing to worry about. Just a theory, though
I understand that, but Sektor's ending says
His father warned him that wearing the dragon medallion brought much power, but at a cost.
I'm eager/scared to see what Sektor is going to have to pay