What data packs change

The config files switch things on and off and scale the numbers the mod ships with. What each mount is comes from data, which a data pack can replace like any of Minecraft’s own:

Data	What it holds
A mount’s definition	Its stats, seats, foods, taming and equipment
Spawns	Which biomes each mount spawns in, and how often
Skill trees	Each skill’s cost, ranks and the level it opens at
Quests and their people	The quests, their stages and rewards, and who writes or speaks them

Before you write one

• Try a setting first. Most changes people make with data packs are already a setting: turn a mount or its wild spawns off, scale its stats, change spawn numbers, tame faster. A setting keeps working when the mod updates; a copied data file doesn’t get the update’s fixes.
• Spawn changes need a restart. Where mounts spawn is read when the world loads.
• Settings still apply on top. The balance and skills files multiply whatever your data pack sets.

Every shipped value is in the mod’s jar, under data/fantasy/, to start from.