Glass tower portal magma cream farm

Magma cubes spawn on platforms over a basalt delta in the Nether, pass through wide nether portals to glass towers in the overworld and come back through a portal into the kill chamber, where you kill them with a sword. The magma cream collects in storage, and builders use the farm for the thousands of magma blocks a gold farm needs. On a server it stops while another player is in the overworld, unless a player or an alt stays by the overworld part.

• On a server, keep everyone else out of the overworld or keep a player or alt at the overworld part, or the cubes despawn there. Over ten builders report it.
• Break the portal you used to reach the overworld part, or the farm portals link to it and the cubes pour out there. Several builders report it and the creator agrees.
• Build the kill chamber part facing east as the video says, builders who faced another way got no cubes in the chamber. Several builders report it.
• Kill with a Looting III sword and keep hitting, an autoclicker or an auto attack mod does it for long sessions. Four builders describe it.
• Expect heavy lag while it runs, builders report big FPS drops and cubes dying from entity cramming. Several builders report it.