Tidal Loop

Tidal Loop was the final reward from the Hydraxis quest chain.

Source
Tidal Loop was a quest reward from the Horde and Alliance quest A Hero's Reward. The quest was part of a chain which started with Poisoned Water and Stormers and Rumblers given by Duke Hydraxis in Azshara. To complete the quest, you must open Hydraxis' Coffer, found in the water south of Duke Hydraxis.