The Key of the Three Moons is a magical item that had been split into three separate mooncrystals stashed in An'telas, An'daroth and An'owyn, heavily-guarded hidden locations throughout Quel'Thalas, each constructed on an intersection of ley lines, similar to the Sunwell itself. The ley lines were like blood vessels of the earth, carrying magic instead of scarlet fluid. Thus interconnected, the crystals created a field of energy known as Ban'dinoriel, the Gatekeeper.