Tutorials/Magma cube farming
Differences from slimes
A magma cube farm is rather similar to a slime farm, meaning that if you've made a slime farm, making a magma cube farm should be a little easier than it would be otherwise. The following is a list of the differences between the two farms:
- Differently-made spawning areas
- Portal rooms
- Fall damage will not harm magma cubes
- Water cannot be placed in the Nether
- Tiny cubes can harm the player
- May need to filter out other mobs (the piston squeezers will fix most problems)
The spawn area for the magma cubes is arguably the hardest part of making a magma cube farm. To start off, find an area to spawn the magma cubes. Basalt Deltas work the best, as a lot of magma cubes spawn there. Also try checking near a nether fortress. Build flat spawning pads and enclose it with blocks. Bastion Remnants have a magma cube spawner in the treasure room that constantly spawns magma cubes.
Drop holes and the reducer
Since the magma cubes blindly jump in one direction before switching directions, dig some wide holes for largest type of magma cube to fall in and add pressure plates to the bottom. Then, place redstone wiring from the pressure plates and link it up to some sticky pistons to crush the magma cube's head. This will make the cube split into medium cubes, which will be crushed as well, causing them to be split into small ones. Make the sticky pistons one block above the plates, or 2 if you need magma cream. Add some holes at the side of the plates for the tiniest cubes to fall out. If you wish to receive magma cream from your farm, enlarge the output drop holes to 2 blocks high and wide for bigger cube crushing and depositing. They will fall into a portal room.
Due to their movement pattern, they can be portaled through into the Overworld by filling the room with portals. Link these to the Overworld, where you can place water. Since these mobs don't take damage from falling you don't need to care about the distance of the drop.
The main farm
Slime Farm-like Design
You can use the basic design for a Slime Farm, just in a Basalt Delta, and with wither roses instead of magma blocks. Just a quick refresher, make some large spawning pads for Magma Cubes, use Iron Golems or Snow Golems to attract them to a killing area, a pad of blocks with wither roses on top, with a hopper minecart to collect the Magma Cream. This can also be used with the spawner in Bastions.
If you're using a design that funnels the cubes into portals, once the cubes fall into the portals they can fall into a water canal system. If you let the medium cubes through, add a water grinder composed of a floor of signs with water at the top. The area where the signs are on should be hoppers that link up to a chest room, like this:
H - hoppers linking to collection room
S - sign/other water-blocker block
W - water
WWWWWWWWWWWWWWWWWWWWWWWWWW SSSSSSSSSSSSSSSSSSSSSSSSSS HHHHHHHHHHHHHHHHHHHHHHHHHH
Then, carry the tiny cubes over to the collection room. Now start an xp farm area.
If you want this farm ONLY to do magma cubes, add a water elevator for zombie pigmen and wither skeletons etc. to transport them to a despawn tank or a separate farm or anything else that stops them interfering with your farm.