A Brief Primer on Hollow

From the Legend Source

A Traveler’s Guide to the World of Hallow

Hallow is an enormous filigree of stone and steel, built
out of the geological wreckage of an entire planetary
system. The inhabitants don’t know this, though.
Hallow is simply their world, and they experience no
more wonderment at the curious shape of its rocky
flesh than a woodsman might when he chops trees for
firewood. Composed of enormous interleaved plates at
varying altitudes, Hallow is clearly a constructed place,
built to some immense and perhaps long-failed design.
Each plate is enormous, made of rock, and vaguely
formed into a shallow tetrahedron, the bulk of a plate’s
weight being supported by great glyphs carved into the
sides of each plate’s downward thrust.

Plates and Constellations

Plates are anchored in bizarre tessellations referred
to as constellations, which are often as many twenty
plates deep and anywhere from thirty to a hundred
plates across. The constellations are laid out such that
even plates near the center of the massive configuration
still receive sunlight, though it may be reflected by
enormous mirror arrays.
Each plate is generally fairly close to its neighbors
within the “layer” of the constellation it occupies, often
roughly a quarter of a mile but up to eight miles in places.
Many of these gaps are bridged by immense truss-works
that offer an easy means of traveling between plates.
Most plates are fairly uniform in size, about 79 miles
in breadth, though the “thickness” of a plate varies with
its anchoring in its particular constellation. A fair number
of small plates do exist, being just under ten miles in
breadth. These are the most uniform, and generally serve
very specific purposes. However, a very few plates see
expansion across the course of their life time, and have
grown to very slightly over 159 miles across.
Layers within a constellation are normally about 79
miles apart, vertically, though in rare constellations,
some of this space might be occupied by the shallow
forms of the smaller plates.
Constellations are normally no closer to each other
than 500 miles and are normally about 1272 miles apart,
though this is the loosest of all the various odd rules
governing the shape of Hallow. Each constellation has
an Angel at its core, which has various implications for
the local environment.
Travel between constellations is generally made
possible by enormous specialized air-ships, often
centuries old. Each ship follows a relatively well-defined
route, moving between a few established ports of call.
There’s a tremendous amount of cultural variation
in Hallow, and the roles of Legend’s races vary much
more wildly here than in most other settings. As an
example, in the constellation of Gabriel alone, there
are four different major races of dwarves ranging from
the ancients with earth-elemental heritage and flying
mountains to the caravaneers with their glass-crafts and
powerful magic.


At the core of each constellation is the last remnant
of direct divine interference in the world of Hallow,
enormous arcane engines referred to as Angels.
Angels are not to be confused with devas, solars, or
planetars, which may still exist in the outer planes but
are extremely rare in Hallow, along with most other
outsiders. Angel is more of a term of convenience,
though, as these are in fact machines of distant and
divine origin, imbued with immense and alien intellect.
Each Angel is alive, after a fashion, and sentient.
While not the source of magic, or natural law, they exert
near-complete control over it within their respective

An Angel provides the power that is necessary to
keep its constellation afloat, and also provides a strange
catchment field that saves anything which tumbles off
the edge of a plate.
Physically, Angels are made of heavy volcanic glass
and steel so light as to be no more than a smoky
translucency, soft as gauze and as enduring as their alien
will. Angels come in a wild variety of shapes, almost
none of them humanoid. They are, however, quite
uniform in their rough dimensions. All Angels measure
approximately 636 miles along one axis, and 318 miles
along two other axes.
Each Angel is honeycombed by hundreds or maybe
thousands of miles of passageways, rooms, and strangely
accessible mechanisms, representing the physical
projection of its cognition.

End Source Material

For more information on the specific setting of this campaign, the Elsir Constellation, see The Elsir Constellation.

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A Brief Primer on Hollow

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