It Goes to 11...

Objectives
Lieutenant Icehammer in the Howling Fjord wants you to destroy the Dragonflayer Longhouse, Dragonflayer Dockhouse, Dragonslayer Storage Facility and 8 Dragonflayer Defenders.

Return the Harpoon Control Mechanism to him once the task is complete.
 * Dragonflayer Defender slain: (8)
 * Dragonflayer Longhouse Destroyed
 * Dragonflayer Dockhouse Destroyed
 * Dragonflayer Storage Facility Destroyed
 * Harpoon Control Mechanism (provided)

Description
We must strike while the vrykul forces are in disarray! Take the harpoon control mechanism to Nifflevar and locate the northernmost harpoon building on the bluff side of the village.

Once there, commandeer one of the vrykul harpoon guns that are stationed on the building's deck. Use the harpoon gun to rain hell on Wyrmskull Village! Destroy the longhouse, dockhouse, storage facility and any defenders that the vrykul may send at you!

Do this and Daggercap Bay will become a much safer port!

Rewards
You will also receive:

Progress
Is Wyrmskull up in flames?

Completion
Excellent work, ! You took out a good chunk of their dragon riders and really pissed off their leadership.

Are you ready to head back to Valgarde and report the good news to Zorek? If so, I've got a crazy idea!