The Basilisk is originally a Slavic folk monster. In Episode 6, Geralt accepts a job to kill a Basilisk. Tomasz Baginski explains, 'A Basilisk is something between a dragon and a chicken. It can turn people into stone just by the power of its sight, by the power of seeing.'

Ivan Poharnok adds, 'It is a bird-type creature, like an ostrich but with a crocodile type of skin… it was another very interesting creature, because we had to make a cut-off head of it because in one of the fights you can see the head as it drops to the ground.'