How do I make a thin layer of lava for mob farming?

I’ve seen videos of people making monster farmers with wires, switches, statues and a thin layer of lava to kill the newly created monster. They always seem to have a perfectly created layer of lava that doesn’t destroy the item but still destroys the monster.

I would like to know if there is a special brick formation or number of bricks that have to be placed for this magical layer of lava to happen.


In order to create a lava trap that damages monsters but does not destroy items, you want to keep a ratio of 1 bucket of lava to six blocks of trench.

This will allow the lava to burn monsters (and you if you don’t make an obsidian skin potion!), but will not be deep enough to destroy the drops — even Coins are safe.
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I didn’t have a bucket of lava handy, but this is what your moat should look like – though I had to use water, which is significantly less lethal.

The last thing to note, is that your liquids may get, for lack of a better word, “stuck” on the edge of the trench. In that case, all you need to do is exit / reload the world, which will settle the liquids, and appropriately depth your trench.

Source : Link , Question Author : stay , Answer Author : Raven Dreamer

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