Uncaps enchantment levels on anvils (up to 255). You can blacklist enchantments in the config.
Extreme natural disasters like volcanoes and earthquakes and sinkholes. Inspired by the general disasters mod.
Uses Boids algorithm, flow-field pathfinding, and a multi-swarm management system to improve pathfinding and movement of swarms of flying mobs.
Many customizable Mob Events and AI behaviors aimed at making the game very difficult. Server-side only!
Rare overpowered mob spawns with random enchants and potion effects that are beyond vanilla limits.