Mod Quark will improve your standard version of the game beyond recognition! The game will be a lot of new blocks with which you can interact.
Start reading Download Quark mod for Minecraft 1.12.2/1.12Tag: download minecraft mods
This mod provides a large number of tools to make different NPC (mobs), each of them will have their own work or role.
Start reading Download Custom NPCs for Minecraft 1.12.2/1.11.2/1.9