Phantom Keep
A rare walled fortress assembled from 320 hand-placed
pieces across 77 jigsaw pools, generating in 39 overworld biomes, with
twelve boss encounters and a deserted village in its ward. Currently
26.2.0.9.14.
What generates
A walled fortress in four layers: an outer wall, a mid wall, a deserted village in the ward between them, and an undercroft beneath holding the ritual chambers. Roughly a hundred buildings per keep sit in the ward.
Keeps are deliberately rare — about 12,000 blocks apart, and never closer than 8,000. Finding one unaided is an expedition. To go straight to one:
/locate structure phantoms_keep:phantom_keepAs a jigsaw example
This is the largest worked example of
template pools in this reference's
orbit, and the numbers are the interesting part: 320 pieces, 77
pools. A build that size runs straight into the failure modes the
structures page describes — pools that sprawl instead of closing, chains
that recurse, and pieces that land turned because a vertical connector was
saved as rollable. It is worth reading alongside
joint type and
the processor list.
MCJIG renders all 320 pieces across the keep's 77 pools as boxes to scale
in 3D, from the pack file, without starting a world. It takes a dropped
.zip, so it is two steps rather than one:
- Download
Phantom_Keep_26.2.0.9.14Alpha.zipfrom the versions page (1,317 KB). - Drop that zip onto elkonia.com/mcjig.
Run it through MCDDD in the same sitting if you have edited the pack — it validates in the browser and uploads nothing.
Twelve bosses
Each has its own summoning condition, a moveset that changes at two thirds and one third of its health, and a three-edition book — the third edition of every book carries the reader's own name.
Most are called at the altar: drop that boss's relic on an uncharged respawn anchor inside the keep and a four-second ritual raises it. Some are earned rather than summoned — the Mason answers five bells rung in the right order, the Pale Warden answers moss cut over the heartwood, and two answer something done out in the village rather than something carried in.
| Boss | Who it was |
|---|---|
| The Hollow Phantom | the keep's memory of a wearer |
| The Gate-Captain | Serla Voss, who never stood down |
| The Archivist | the Recorder, still writing |
| The Mason | Hale Brann, who would not say how many towers |
| The Under-Librarian | the signal floor and the silence |
| The Broodmother | what the cells were really for |
| The Pale Warden | the creaking of the pale wood |
| The Mirage Master | ground that was never there |
| The Void Weaver | a thread with no end |
| The Arch-Evoker | who recused himself, and fired anyway |
| The Household Guard | an iron golem given a list |
| The Razorback | a boar that got out and learned the lanes |
Installing
Unlike the two worldgen packs, this one adds a structure, so it drops into an existing save without a new world. The catch is ordinary structure behaviour rather than anything specific to this pack: only chunks generated after the pack is added can contain a keep, so you will need to travel into fresh terrain to find one.
Compatibility
| Minecraft | 26.1.2, 26.2 |
| Latest version | 26.2.0.9.14 (1,317 KB) |
| Loader | Data pack — no mod loader |
| Licence | GPL-3.0-only |
| Updated | 2026-09-03 |
| Coexistence | Adds a structure, not a generator — safe alongside worldgen packs. |