"Excellent, Guardian. Accept this quest, and follow the instructions to claim your new Rocket Boots."
After accepting the quest, further instructions will be found in the chat bar. Locate the Avalon bank and head down the staircase. Across the room is the bank vault, with an Avalon guard standing in front of it. Walk towards it and step on the pressure plates, which will open the door to the vault. Walk to the far side of the vault and open the chest. The Rocket Boots are inside. Take them out and put them in your inventory. Return to /warp throne.