The Last Ones

In a world where people who have elemental powers are royals. The last non-related royals have come to an end, leaving only royals who are related to one another.

This leads to the kidnapping of the remaining half-bloods.

The King announces the commencement of an event where half-bloods are forced against their will to compete for the hand of the crown prince.

Will the suitors manage to fend off the challenges thrown at them?

What secrets will come out of hiding?