Before we reveal who's won, here's how illustrator Vlado Krizan imagined the Queen of Darkness...
And here's how cover artist Robert Ball envisaged the Mother of Demons...
Fans old and new alike entered the competition, and so, rather fittingly, we have actually ended up with two winners - one child and one adult. And they are...
Ollie Troman, aged 8
Four runners up will also receive codes for The Warlock of Firetop Mountain, and they are Camden Travis, Tenisha Raymond, Simon Walpole and Kalman Mikorka.
Camden Travis, aged 6
Tenisha Raymond, aged 13
Congratulations to both the winners and the runners-up, and thank you to everyone who entered.
May your STAMINA never fail!