Minecraft How to Make an Exp Farm This article is about farms which spawn mobs in natural weather condition. For single-species farms built around a spawner, come across Tutorials/Spawner traps. Mob farms are structures built to acquire mob drops more easily and in larger numbers. They usually consist of two components: a large, night room to spawn mobs which are funneled into a cardinal location, and a mob grinder to kill them apace and efficiently. Contents 1 Locations 2 Drops 3 Designs iii.1 Spawning belfry three.1.1 Using observer blocks