Tetrahedron Generator

The Tetrahedron Generator is one of the three colossal blackrock structures which the Guardian's followers erected in Britannia to prepare the realm for his coming. It appeared in Ultima VII.

Description
Constructed sometime after the founding of the Fellowship some twenty years prior to the Astronomical Alignment, the Tetrahedron Generator served the function of disrupting the ethereal waves of Britannia, making the arcane arts unreliable and driving mane mages and wizards to madness as their natural attunement to the ether was corrupted.

Situated within the Dungeon Deceit, this blackrock construct could only be entered by a party possessing the enchanted Ethereal Ring - all others would fall into a deep slumber upon approaching it, only to wake up to find themselves elsewhere. Guided by the Time Lord and the seer Penumbra, the Avatar located this artifact and stepped inside the Tetrahedron, where they were forced to combat its spectral guardian. One the hero slew the beast, the generator too was destroyed, and the Avatar was able to lay claim to the miniature blackrock prism which lay within it.



Trivia

 * The shapes of the three generators (a cube, sphere, and tetrahedron) form the logo used by Electronic Arts from 1982–1999.
 * A lightning trap lies directly at the entrance of the Tetrahedron, although it can be disarmed using a standard Destroy Trap spell.
 * In the SNES Port of Ultima VII, the Ethereal Monster lies in the chamber directly before the Tetrahedron, although the Ethereal Ring is required to slay it. In addition to this, the Tetrahedron features no internal defenses, and will self destruct the moment the Avatar moves its corresponding prism from a nearby pedestal.