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The adventure/world library behind Majestic: jigsaw structure helpers and a phased boss-encounter framework. Adds no content on its own.
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Expedition Core is the shared adventure engine of the Majestic ecosystem. It ships no dimensions, structures or bosses of its own — it gives other mods (starting with Majestic itself) the frameworks to build them on top of: jigsaw structure-pool utilities, a phased boss-encounter state machine with arena locking and multiplayer scaling, loot-table injection, and a GeckoLib render base for complex mobs. If you were told to install this mod, it's because another mod on your instance depends on it — most likely Majestic. It is independent of the magic library (Astral Core) and reusable by any mod. |
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Helpers to build and register jigsaw StructureTemplatePools from a piece/weight map, spacing/separation placement settings, and a controlled piece-spawn callback registry for populating generated rooms with mobs or loot.
A data-attachment-backed state machine for any Mob: health-threshold phases with callbacks, a temporary arena lock with an escape hook, a boss-bar wrapper, duplicate-and-distribute loot rolling, looped per-player music, and a configurable multiplayer health/damage scaling factor.
A thin GeoBossEntity / GeoBossRenderer base to cut the usual GeckoLib boilerplate for boss and complex-mob rendering.
Inject additional pools into existing vanilla or structure loot tables, gated by a datapack-load-time condition, plus simple grant/check hooks for advancements from server code.
| Package | What it provides |
|---|---|
structure | JigsawUtils, StructurePlacement, PieceSpawn. |
boss | BossEncounter and its supporting classes (phases, arena lock, bar, loot, music), plus boss/render for GeckoLib. |
loot | LootInjector, AdvancementHooks. |
config | Server-side multiplayer boss scaling and arena-escape settings. |
dimension | Future integration point (custom dimension bootstrap, safe travel, return anchors) — not wired yet. |
| Minecraft | 1.21.1 |
| NeoForge | 21.1.259+ |
| Java | 21 |
| Side | Client and Server (required on both) |
| Depends on | GeckoLib |
Early development. Expedition Core is still pre-release (0.0.0-beta.x); the public API may change between betas.
Developed by Stalking Dragons as part of the Majestic ecosystem, alongside Astral Core, Almanac Core and Majestic itself.
https://codex.skdragons.com/
Codex Stalking Dragons — Minecraft Modding
