Makes monsters more powerful with time and periodically attack your base (also other stuff).
Adds new AI patterns to creatures to make your game more interesting and challenging.
Allows you to modify chest generation on a per-chest basis, taking the position of the chest into account.
Allows you deep customization for your mobs, including drops, attributes, NBT, and more!
Allows you deep customization for blocks, including drops, break speed, flammability, and more!
Changes the mechanics of bows, allowing headshots and reducing the damage arrows deal at close range.