Pyramid

Pyramids are massive tetrahedral vessels that make up the armada known as the Black Fleet.

Overview
Pyramids appear to vary widely in size, but the ones most commonly seen are nearly twice the size of a Fallen Ketch. They all share a simple tetrahedral shape, broken up by lines of yellow-orange lights. They are accompanied by fleets of smaller craft known as Pyramid Scales, which are about the size of a jumpship.

It is unclear to what degree the Pyramids are merely spacecraft or fully autonomous machine entities analogous to the Traveler. During Season of Arrivals, the Ghost states that the Pyramid on Io is actually a paracausal being, like the Traveler. However, they also appear to be used as vehicles by the Witness and its Disciples, with the Witness having commanded the Black Fleet from the Pyramid known as Essence, and Rhulk and Nezarec having commanded the Sunken and Lunar Pyramids, respectively. It is unknown at this point whether all other Pyramids are home to a single Disciple, or whether some contain armies or are empty of life entirely.

All Pyramids thus far explored have interior spaces designed for roughly human-scale inhabitants, and the Europan pyramid is also filled with numerous artifacts pointing to its habitation, including what appear to be workstations at which partially-completed statues of colored stone sit unfinished. These statues vaguely resemble humanoid or equine figures, but it is unclear what, if anything, they actually represent. The Pyramids' interior spaces also contain what appear to be urns of various shapes and sizes, either arrayed in open spaces or stored in racks set into walls.

Design and architecture
The architecture of the Pyramids is minimalist and geometric, but with many intricate details and a variety of construction materials. The atmosphere inside is generally oppressive and foreboding, featuring chambers and hallways illuminated by harsh red and white lights, deep chasms or pits whose depths are obscured by mist, and huge bleakly-illuminated open spaces stretching for many kilometers into the distance. Although the Lunar Pyramid had been left buried beneath the surface of the Moon for centuries, numerous sounds can be heard within its walls including harsh whispers, an ever-present hum of machinery, and distant howls. Most of the Pyramids explored thus far contain a room with a statue resembling a veiled humanoid figure, the significance of which remains unclear, but which is identical in form to the entity labeled by Clovis Bray I as "Clarity Control"

Within the Ionian Pyramid, a unique chamber was discovered in the form of a cavernous shrine. At its center, a stone idol of a Pyramid stood before numerous effigies resembling several races, beyond which lay numerous pillars. These effigies included depictions of Hive, Fallen, Cabal, and Guardians of the Last City, all gazing up at the Pyramid. Shadows of the Pyramid stretch across the ground, reaching out towards the surrounding races, the largest of which extends out towards the Fallen.

The Sunken Pyramid within Savathûn's Throne World seems to display a degree of personalization based on the aesthetic desires of its resident, the Disciple Rhulk. Many walls are adorned with murals or seemingly abstract colored shapes, some of which are explicitly representational and others whose purpose or meaning, if any, is unknown. Rhulk also has placed a number of displays throughout his domain, including a pedestal supporting a rib bone from the Leviathan of Fundament, which he personally removed from the beast during their confrontation. It is unknown whether all Pyramids display this level of customization.

Capabilities and technology
As discovered by Asher Mir through his experimentation, Pyramids have a defensive mechanism where incoming projectiles appear to simply disappear on the point of impact, while still physically existing in some form. This defense also seems to suppress electromagnetic radiation to a degree, requiring a fully equipped relay system to remain detectable from the outside.

During the Black Fleet's final assault on the Traveler, Pyramids were seen to emit waves of Resonance energy, which could destroy incoming ships and neutralize the Traveler when the latter tried to defend itself.

On Europa, several artifacts originating from the Pyramids have been encountered, including Stasis Locks, Cruxes of Darkness, Splinters of Darkness and the Ziggurat.

Known Pyramids

 * Essence (Flagship)
 * The Lunar Pyramid
 * The Ionian Pyramid
 * The Mercurian Pyramid
 * The Martian Pyramid
 * The Titanian Pyramid
 * The Europan Pyramid
 * The Sunken Pyramid