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“What I’m about to give you is called seaforium. It is a highly volatile explosive with some unique properties. Due to its malleable nature, you will be able to fill in the hinges and cracks of the cage for maximum damage. Return to your friend and use the jumbo seaforium charge to set him free.
Let’s hope he honors the bargain. He’s our only hope.”
-Engineer Reed
Speak to Gymer at Thrym’s End in Zul’Drak once you have used the Jumbo Seaforium Charge to open the Scourge Enclosure that is holding him prisoner.
Provided item:

Quest Giver: Engineer Reed — Crusader Forward Camp, Zul’Drak [25, 63]
Objective: Use the Jumbo Seaforium Charge to blow open Gymer’s cage, then speak to him.
Quick Facts
Walkthrough
Head back to Gymer’s cage at Thrym’s End [19, 56]. Right-click on the Scourge Enclosure (the cage itself, not Gymer) to use the Jumbo Seaforium Charge. The cage blows open and Gymer yells “FREEDOM!”
Talk to Gymer to turn in the quest. He pledges to help you destroy the Scourge, setting up the final quest in the chain.
Troubleshooting
Lore Context
The quest title is a Star Wars reference. Engineer Reed’s description text echoes Princess Leia’s famous hologram message: “Help me, Obi-Wan Kenobi. You’re my only hope.” Reed says of Gymer: “He’s our only hope.”
Reed describes seaforium as a “highly volatile explosive” with “malleable” properties that can be packed into hinges and cracks for maximum damage.
Seaforium is a recurring explosive material throughout WoW, essentially the Azerothian equivalent of C-4 plastic explosive. Engineers can craft various seaforium charges as a profession perk.
Gymer’s completion dialogue reveals his motivation: the Scourge have been using storm giant corpses to create flesh giants and abominations. This is personal for him, not just a debt repaid.
Explore Zul’Drak’s hidden easter eggs, lore mysteries, and connections across Warcraft history in Vikstone’s Zul’Drak Chronicles, along with the complete quest storyline.
You will be able to choose one of these rewards:
You will receive:
Upon completion of this quest you will gain:
Vikstone's War JournalSeaforium. Highly volatile, Reed warned. Malleable enough to pack into hinges and cracks for maximum damage. One wrong move and I’d be adding my own remains to Zul’Drak’s dead.

Gymer watched as I worked, his eyes following every movement. “I am a giant of my word, little one.”
I stepped back. The charges did what charges do.
Metal shrieked, the cage burst apart. Through settling debris, Gymer rose to his full height, scraping the cavern ceiling as he stretched limbs too long confined.
“FREEDOM!” The word shook dust from the cavern ceiling.
Then, quieter: “Do not be afraid, little one. Gymer is an honorable giant. Like you and your people, I too wish to see the Scourge driven away from this land and the Lich King destroyed. I will help you, as promised, to the best of my ability.”
A storm giant king, fighting for vengeance against the brother who betrayed him.
Gymer was free, and a hundred-foot storm giant with a grudge had one thing left to settle in The Storm King’s Vengeance