Tutorials/Cave spider farming

Cave spiders can be dangerous enemies - they are small: smaller than a slab, and apply the poison effect to the player. This makes them hard to farm. However, with some skills and care, it is possible.

Spawning area
The spawning area is generally the same as for other monster spawner-based traps. However, remember that cave spiders are smaller - they can fit through gaps 1 block wide and 1/2 block tall. Also, remember that they can climb walls.

Manual Grinder
Because of their size, ability to hold breath underwater, and ability to climb walls, lava, water, fall damage, and gravity grinders are ineffective or not as effective on caves spiders. Also, cactus isn't very effective, because cave spiders are small enough to go in between two cacti without taking damage (this is because cacti cannot be placed right next to each other). For this reason, it is very difficult to kill them automatically, without iron golems (see below). The easiest way to make a cave spider farm is to use a manual grinder.

Manual grinders require a hole that is too narrow for cave spiders but large enough to allow players to attack them easily. One simple way of making one is by placing two fence posts next to a closed door:

Automatic Grinder
One of the few ways to kill cave spiders without the player's aid is by placing iron golems in the collection chamber of the cave spiders. Place hoppers along the floor, all eventually connecting to a double chest. The iron golems will kill the cave spiders, and the loot will fall into the hoppers and go into the chest.

The disadvantage of using this method is that cave spiders will damage the iron golems as well, and eventually the iron golems will be killed. It is recommended to have an iron golem farm before trying to attempt this farm (otherwise, you will go through a lot of iron!).

de::technik:Monsterspawner-Fallenanlage