Mobs and mods
So, before anything is safety. So here's how to be safe in minecraft survival! However some mobs are dangerous. Like the creeper. Some are not like the villager and the iron golem but you have to build him. You need 2 blocks of iron and a jack-o-lantern. Stack the 2 blocks of iron on top of each other then a jack-o-lantern on top. Then he spawns to life! If you do not want the bad mobs simply go to the corner and press "OPTIONS" then lower the difficulty.