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I have created a mob farm which I want to be able to turn into an XP farm at the switch of a button. Basically a multitude of mobs spawn at the top, fall down, and die. I want to add a dispenser that dispenses water so I can catch the mobs and kill them for the XP instead of their drops. However, creepers start to self-destruct as soon as I start hitting them through my half-slabs. I've tried using different combinations of slabs, stairs, fences, etc, but the creepers keep blowing up my mobs. Is there any way to stop this? I can draw a diagram of the XP farm if it would help.

  • 3
    Have you tried damaging them before, like with fall damage? – Fabian Röling Jun 17 at 23:42
  • @FabianRöling you see I'm trying to convert a mob farm to an xp farm at the switch of a button so the fall without water is lethal. But this has given me an idea for an additional bubble elevator to damage the mobs for the xp farm. – Reflexive Jun 17 at 23:45
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    creepers die from a fall height of 24 blocks, you could make the button push up a bunch of sticky pistons to raise the floor so that the creepers only fall 23 blocks and they will survive with 1 heart left, so they will die to one sword swing. – Andrew Jun 18 at 9:15
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    Then push soul sand in from the side, hoppers still get the items through it. These are really old concepts, they are used basically every day since 2013. – Fabian Röling Jun 18 at 12:05
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    @FabianRöling I was not aware of these concepts. Im new to non spawner mob grinding. If you want to make this suggestion an answer I will accept it. – Reflexive Jun 18 at 12:08
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I have been testing this vigorously and I've found a combination of slabs and blocks and that means that the creeper cannot see you and won't explode, no matter how much it is attacked. Here it is: enter image description here Notice that the player is standing on a bottom slab, so they can peer into the whole easily.


Another possible solution that I found during testing is to use a combination of stairs and slabs and a bow. While this does affect the durability of the bow I think that this can be overlooked by how effective this system is. enter image description here

The setup for the upside down stairs stops skeletons from shooting at you and the distance stops the creepers from exploding.

  • Mending on the bow could also be useful (though if you're using a general mob farm for XP, mending may not be available yet) – Redwolf Programs Jun 18 at 13:54
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First thing to note: if a Creeper is standing in water, even if they do explode, they won't blow up any blocks, but the explosion will still deal damage to you and other mobs around them.

Ranged weaponry is the best bet for killing creepers, as they need to be within 3 blocks of the player to trigger an explosion. If you stand outside of this range and shoot them, then they will not explode.

If a Creeper cannot see you (turn on hitboxes to see their line of sight), they will not explode, even when attacked.

The only other option I could suggest is to set up cats in a line, so ensure that the Creepers don't fall down the same shaft as the rest of the mobs, and set up an automatic killing area for them specifically. You'd lose a little bit of exp, but you wouldn't have to deal with them at all.

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    The easiest way to filter creeper (& witches) is by making them "float" away, as both of those mobs swim up in water, while skeletons and zombies swim down – Ferrybig Jun 19 at 14:40
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You can make a really long building. In top of that, make it really dark so mobs can spawn. Add water in top of the building and make sure to not spill it to bottom of building, otherwise mobs will survive and they can kill you/other mobs.

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    That is the process i already have in place, my question was how to kill a creeper that fell down the long tube without them exploding. – Reflexive Jun 19 at 7:15
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    This does not answer the question – JBentley Jun 19 at 20:32

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