Reign Of Fireworms — [s3e7]

The climax involves the Riders managing the migration and dealing with the massive, glowing Fireworm Queen.

"Reign of Fireworms" is the (part of the Race to the Edge series) in the How to Train Your Dragon franchise. In this episode, the Dragon Riders discover that Dragon's Edge is directly in the path of a massive Fireworm migration, threatening to burn their base to the ground. Episode Summary [S3E7] Reign Of Fireworms

The Twins find a rock that leads to a dispute over who actually "owns" Dragon's Edge. The climax involves the Riders managing the migration

Fishlegs identifies the scouts and warns that the rest of the flock could arrive within a week. [S3E7] Reign Of Fireworms