Suspicious of the offer, the Riders investigate a hidden area on Viggo's map and discover a new tribe called the Defenders of the Wing .

Defenders of the Wing, Part 1 | How to Train Your Dragon Wiki

Led by Queen Mala , this tribe worships dragons and guards a "Great Protector"—a rare dragon known as the Eruptodon .

In this episode, the war between the Dragon Riders and the Dragon Hunters reaches a critical turning point when Viggo Grimborn makes a surprising move. Key Plot Points

The fierce leader who initially sentences the Riders to death, believing they are allied with Viggo.