First Idealized by the Alliance scientist Raven Muriel and, a Surprisingly drunk, Sylvanas Windrunner after the Attack on Quel'thalas by horde. The Defensive Mobile Tower, codenamed: "Theia", is a highly advanced defense built for combat. and designed for multiple roles. The First tower, Nicknamed the "Hillsbrad Watcher", was built near the newly rebuilt Hillsbrad. as both a testing ground for it's performance and as a sign that the horde's sacking of Hillsbrad will not happen again.
However before the Tower was used. the War ended with an Alliance Victory and as a result. the Tower was left without a field test and Thus Could not be Approved. To demonstrate that the Horde will not Attack the elves Again. King Anasterian Sunstrider had Requested the construction of these Arcane Wielding Monstrocities. The Sunwell Defenders were destroyed by Deathlord Harvan during the Battle for The Sunwell.