Sweet berry magma block farm

Magma cubes spawn on a slab platform on the nether roof, above a basalt deltas biome. An iron golem stands in the middle under sweet berry bushes, and the bushes kill the magma cubes. A hopper minecart collects the magma cream and unloads it into a crafter that makes magma blocks. Leave the crafter out to keep the cream. You AFK on the platform while it runs, and nothing on the build is rare. It only works above basalt deltas: anywhere else piglins and skeletons take the spawns. Ghasts spawn on the platform too, so builders roof it.

• Build it above a basalt deltas biome. Anywhere else piglins, zombified piglins and skeletons spawn instead of magma cubes. The creator names the biome, four builders hit this.
• If the hopper minecart stops, check the powered rails stay on. One builder fixed it by removing the redstone torch and swapping the block above it for a redstone block. Four builders report the cart stopping.
• Ghasts spawn on the platform and can hit the iron golem. Stop them with bottom slabs 4 blocks above the platform or rows of glass over it. Four builders report ghasts there.
• If the crafter makes no magma blocks, check that the comparator faces the right way. Four builders report a crafter that does not craft.
• Leave out the crafter if you want magma cream instead of magma blocks. The creator says so in the comments.
• Wither roses kill faster than berry bushes and speed up spawning. Top tips comment, 7 likes.