I am selling a amazing base in the wild that has 3 grinders. The base has 8 5x7x2 rooms. There are stairs that take you underground and to the grinders. There are 2 zombie grinders and 1 spider grinder.Pictures:This zombie grinder is super fast, I got 40 zombies to spawn in 1 minutehttp://imgur.com/2PNMZThis is the second zombie grinder, it is slower because it has a elevator then a drop (angle is to show its different from the other grinder)http://imgur.com/knT3HThis is the cave spider spawner, I just got it to spawn 50 spiders in a minute.http://imgur.com/19k0AAll the grinders drop the mobs and leave them with 1/2 a heart for a easy kill. The price for the base and all of the grinders is 25,000r or best offer.