Portal loop magma cream farm

A magma cream farm that loops magma cubes through nether portals. They spawn on a platform in the nether, go through portals into an elevator in the overworld, and come back through three portals at the top into the killing chamber, where you kill them with a Looting sword. The medium cubes they split into go round again for another kill, and a filter removes the tiny ones. Optional frogs eat the tiny cubes for froglights, and more frogs give more of them up to a limit. It suits a player who wants magma blocks in bulk, for example for a magma based gold farm. You stay at the killing chamber and attack, by hand or with an autoclicker.

• Build the overworld elevator high: the bottom of its tube at about Y 248, level with the killing chamber's portal, and the top portals above Y 300. Lower, the portals link wrong and cubes escape. The creator's answer to four builders.
• Keep three hopper minecarts in the unloader at the same time: one in the dropper, one in the dispenser, one on the rails. The creator's fix after two builders had the minecart stop.
• Install Lithium if you kill with an external autoclicker, without it the armor stand can break. The creator calls it a frequent issue, on his tutorial page.
• Do not shorten or speed up the overworld elevator, for example with bubble columns: the cubes must spend at least 15 seconds in the overworld. The creator's reply.