Fearing his power, the Æsir gods decided to bind him, but ordinary measures could not bind Fenrir. The dwarfs had to make an unbreakable rope known as Gleipnir. Fenrir killed the mighty Odin ...

As long as the IP is used, we'd quantify this as part of a 'series'. Fenrir the wolf, son of Loki, is a monster. To imprison him, the gods call on blacksmiths tiny & Tall to make an unbreakable chain.