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Im looking for a high return mob grinder, size and resources dont matter to me. All i need is a ton of arrows, gunpowder, and bones. String and eyes would be a bonus, but if your design doesnt support spider spawning thats fine. And an Enderman free mob grinder would be nice. Thanks

You want to use a piston pusher design. There are several designs, and all are well documented on YouTube.

I like kinds that use water to push the mobs in a pit, like in monster spawners/dungeons

For spiders, something along these lines works best for me, although I do it a little bit differently. I only work with spawners that are at a high enough depth for me to be able to dig down around 20 blocks or so, and I don't use water or make the fence go all the way to the top like that. You can also add in a door, so that you can get drops easily, since using water to push the drops to you means they won't be taking fall damage. You can add a toggleable lighting system to turn it off using redstone, for safer access, or just be quick about it in between waves.

Skip to 1:55 (there's more than one design in this video)

Thanks Ill try some of those options