I have a couple of Mob Spawners surrounded by torches (thus rendered inert), and I want to try using them to farm enemy drops. What's the most efficient setup to automatically kill spawned mobs and collect their spoils?

4 Answers 4


Most mob farming techniques use a stream of water which collect all the monsters in the room to a central point, and then drowns them by pulling them underwater. Some other ways to kill them are:

  • Pushing them via a water current into cacti
  • Using lava to kill them
  • Making them fall really far so they die from the impact

Just as a note, most people just build enormous completely dark rooms (like this one) to farm mobs rather than using the actual mob spawner blocks.

Here are some screenshots from the link above:

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  • As mentioned in the link above, the most efficient location is on the zero chunk. The easiest method for finding this chunk is using external map tools (viewers or editors).
    – MBraedley
    Commented Oct 30, 2010 at 21:06
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    The zero chunk may no longer be the best spot for your spawning tower. Apparently, changes have been made to the spawning algorithm reducing the effectiveness of this style spawning tower.
    – MBraedley
    Commented Oct 31, 2010 at 22:12
  • They may all be equal in terms of lethality, but considering you're probably after items/hr (max) then I'd suggest a lava trap to kill them. The one I use is the one from a youtube video. Make sure you put glass blocks over the top of most of the lava so that monsters can't walk into it (you lose the drops).
    – jcollum
    Commented Nov 5, 2010 at 18:35

      I found a really neat video a while ago of a Mega Mob Factory someone had made for farming Ham. I'm sure you could do the same with a mob of creepers.

      This works on the same principle as most mob farms: it uses water currents to trap pigs and pull them underwater, drowning them. All of the spoils end up at a singular point below the structure, that can be accessed by a ladder.


The most efficient way I've found for farming items from zombie and skeleton spawners is to place a water block in one corner of the dungeon, a lava block held up by signs in the opposite corner, and a water stream carrying items out.

For spiders the previous design doesn't work because they can get pushed past the lava block and under the walls where they get stuck. Instead I dig the dungeon a bit wider, have water flowing from the walls to the center and in the center have a 3x3 hole with a cactus block in the center of the hole. The hole has to be at least 7 squares deep so that the cactus can remain below the rim even when fully grown and is 3x3 because spiders fall in easier than with a 2x2 hole. Under the cactus use water to get the items to a collection point, or just stand there if you like watching the spiders die. I suppose a column of lava would work as well as a cactus, but you'd have to make sure that the column was tall enough that any spider falling through spent enough time in the lava blocks to die and you'd need a lot of signs.

Make sure to light all the areas outside of the dungeon and that no light is getting in. Also make sure to keep your collection point close enough to the spawner for it to keep spawning while you wait. (According to the wiki you need to be within 16 blocks of the spawner.)

I've not done a comparison between the item drop rates of these compared to drowning traps, but I suspect that the items destroyed by cactus/lava contact are balanced out by the slower kill speed of drowning. If not, both of these could be modified to be drowning traps.

  • I tried to include some text art to diagram this, but SE ignored my newline/carriage return and put all the characters on one line. Anybody got some tips on avoiding this?
    – Fambida
    Commented Aug 2, 2011 at 1:00
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    You can end lines with two spaces to force a new line.
    – Kevin Yap
    Commented Aug 2, 2011 at 1:18
  • 2
    And start them with 4 spaces to trigger pre Commented Aug 2, 2011 at 6:25
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    You could also just grab a screenshot from within Minecraft using F2, then place the image in your answer.
    – Keaanu
    Commented Aug 2, 2011 at 14:30

ERR: If you want to make a mob farm to collect drops, DO NOT use lava or cactus. Both can destroy items. I would suggest putting flowing water around the spawners, and then making a deep channel at one end, at the ege of the water so the water comes right up against the channel, but does not flow down. Then, put hoppers at the bottom of the channel and make an access shaft with a chest connected to the hoppers.

  • 1
    Editing is a core activity here at Arqade, MTWTech. Any user has the ability to suggest edits. Ensure that your answers only answer the question. Information that's not related will be deleted.
    – Frank
    Commented Dec 12, 2019 at 15:02
  • @Frank okay, i see. I got stuck in an answer ban, so all i can do is comment(At least i can still comment though😩🙂.).
    – MTWTech
    Commented Dec 12, 2019 at 19:05
  • 1
    You can comment on your own posts, yes. You can also edit your existing posts to try to make them better. If you edit one of your deleted ones, you can flag it for us to take a look at, and maybe undelete. That might be able to lift the ban. I'd highly recommend taking our tour and perusing our help center to learn more about how Arqade works.
    – Frank
    Commented Dec 12, 2019 at 19:13
  • i dont even know how to delete my posts
    – MTWTech
    Commented Dec 12, 2019 at 19:21

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