Netflix provided The Witcher fans with a Halloween treat - a new monster montage video, set to Monster Mash no less, that appears to give the briefest of glimpses at some of the horror's Henry Cavill's Geralt of Rivia will have to face off against in its upcoming second season. In Netflix's video, which you can see below, we get a recap of some of the monsters that were featured in The Witcher's first season.