Simple bastion spawner magma cream farm

A magma cream farm built around the magma cube spawner of a bastion in the Nether. An iron golem and wither roses kill the cubes the spawner makes, so no water and no player kills are needed. It suits a player who wants magma cream for fire resistance potions or magma blocks for a gold farm. Building it is risky: magma cubes keep spawning and knock builders into the lava.

• Bring fire resistance potions if you cannot build in peaceful: magma cubes knock builders into the lava while they build. Four builders report it, one needed several potions on a hard mode server.
• Torches will not switch the spawner off: magma cubes spawn at any light level, so they keep coming while you build. 12 likes on the comment saying so.