But certainly titanic in origin, considering one of the Pillars of Azeroth is named "Tears of Elune".
In Tauren mythology, Mu'sha, AKA Elune, is the "Right Eye of the Earthmother", paired up with An'she, the "Left Eye of the Earthmother". Considering Azeroth is the world-soul, she might be the Earthmother, making Elune an observer/keeper/an unknown form of titanic creature of immense power, far greater than most keepers.