Following Krogan's capture of Hiccup Haddock III in "Midnight Scrum", Ryker Grimborn and the dragon Hunters met with Krogan at the island. However, Ryker refused to pay Krogan the bounty. A fight ensued between Krogan and Ryker's hunters. Hiccup tried to make his escape and caused a stampede of sheep toward Ryker and his men by using Inferno. Stoick and the Dragon Riders managed to find the location after they interrogated Savage.
- In Norse mythology, Sleipnir is the eight-legged horse of Odin.
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