A big content update! This update features the first Ceilands mob as well as plethora of advancements!

• Added a new block set: Roofshale. Roofshale is found near the ceiling and can be made into polished and brick variant. Even chisellable too.
• Added a new mob: Castle Lord. The first miniboss of the Ceilands!
  • Has 100 Health, wears a full Castle Lord armour set, and wields an Iron Sword (for now.)
  • Can open doors so be careful!
  • Drops a piece of Castle Lord armour set. Renewability is planned.
• Added six new advancements, bringing the total number of advancements to 10.
  • Sleeping on Cloud Nine: Use a Bed in the Ceilands.
  • Top Trader: Make a trade in the Ceilands.
  • Daredeal: Make a trade in the Ceilands while standing at Y of 1 or below. Prepare for a lot of anxiety on this one.
  • Loot Cubed: Loot a chest in Ocean Cubes.
  • Usurper: Defeat the Castle Lord.
  • Fit for a Royalty: Obtain a full set of Castle Lord armour.
• Updated Hanging Castle:
  • Chains now extend all the way to the ceiling or strong supporting blocks.
  • Integrated Roofshale in structure.
  • Castle Lord now spawns within throne room.
• Updated Ceillages:
  • Added abandoned variant, which results in degraded appearance and missing villagers. Cobwebs will generate, and most doors will be missing. If the doors do generate, they will be open.
  • Ceiltrunk variant now has chains extending all the way to the ceiling.
• Added many new translation lines for future content.
• Added Ceiltrunk & Luzawood Ceillages to Village tags.
• Improved Dramatic Doors compat: short and tall Ceiltrunk and Luzawood doors should appear before and after the regular door in creative inventory.
• Made adjustments to reduce the likelihood of stray Ceiltrunk leaves seemingly generating without trunks randomly on mossy floor.
• Improved Ruined Ceilands Portals by adding structure void thus the air of the lower half of the structure won't overwrite terrain or structures.
• Buffed the spawn frequency of animal mobs in most Ceilands biomes. Finding animals should be much easier now. This makes Luzawood Forest a much more ideal biome to live in.
• Increased the frequency of Ruined Ceilands Portals, appearing 50% more often.
• Tweaked the generation of Colossal Ceilshrooms so a moss block should be generated at the base of the stem, and made it less likely to generate in illogical location.
• Fixed plank recipes unlocking early.
• Fixed some data pack errors.
• Fixed incorrect ore drops in 1.21.1.
• Refactored several code to make it less redundant and to make it easier to maintain:
  • Registration process is done on the common side.
  • A list of mod items for creative have been created and stored on common code, thus ensuring parity between mod loader systems.