# Mechanics Learn about all mechanics you can edit with AdvancedMobs here. * **Custom mobs appear in the world just like normal mobs do!** Mobs spawn depending on what biomes they have, if they are hostile (example: only spawn at dark, in caves, etc.) * **Peaceful and hostile mobs!** Hostile mobs will attack players that are in range with realistic damage handling (armor and other modifiers change how much custom mobs deal damage to players) * **Build Bosses With Blocks!** Allow players to build custom mobs with block patterns * **Sounds!** Mobs use selected vanilla sounds for immersive experience * **Breed mobs!** Peaceful mobs can be bred using specified items in config (can be disabled) * **Mobs drop loot!** All mobs drop their own specified loot, and you are able to configure it * **Persistent mobs!** Our custom mobs are persistent and stay after restarts or leaving areas and coming back later. Never worry about leaving your farms and mobs despawning.