The New Adventures of Robin Hood (1997) : 3x7

Robin and his band try to thwart the banditry of Patrick, Earl of Glenbauer, by protecting a village on his warpath. Rowena accidentally conjures up a monster, Cerradyn, who is a master huntsman. He needs to capture and sacrifice seven warriors to realise his full powers and become invincible. It is not until he has captured six that Tuck and Rowena discover what is happening, and learn that only Rowena can make him disappear. They track him to his lair in a race against time.