Unknown Amatsumagatsuchi is an Unknown Elder Dragon first introduced in Monster Hunter Frontier: New World. Its an Amatsumagatsuchi of pure evil and said to only appear when the Supremacy Stygian Zinogre appears in the Misty Peaks. This Unknown Elder Dragon only randomly appears as a quest after defeating the Supremacy Stygian Zinogre and defeating a G-Rank Amatsumagatsuchi.