Iron Island has no iron on it yet. Basket pulls up the map to show where it sits, and where "Basket Island" is, the big island claimed with signs the night before. The plan for today is underground: four iron golem cells around a middle, with every golem washed into one place to die and drop its iron.
The first cell
The tour starts in the cell that already exists. The farm runs 65 blocks from end to end. Each cell needs 30 doors in rows of five, plus villagers, which Basket bred upstairs and brought all the way down from town. The golems will spawn, fall, and get pushed along by water toward the middle, where they drop through to lava and burn. The iron goes up through hoppers into a chest. For now the chest is empty. "If you're a person, do not go forward, because you will just die."
The problem is the villagers. They aren't breeding as fast as Basket wants, even with crops planted for a farmer and plenty of food.
A slapped golem
There's other news from the night before: Basket's first death. "There's an iron golem on top of my bed, and so then I slapped the other golem, and he wasn't happy about that." It cost a lot of XP: "I had almost 30 levels, and then I died."
One theory about the breeding is that the cell upstairs, where the first villagers were bred, sits too close and still counts as part of the same village. Basket crafts a wooden axe and pulls out those doors to see if it helps.
Digging the second cell
Then it's back underground to finish the next cell: 18 by 18, with a 4 by 4 hole in the middle that drops to the floor below, and a fresh stack of doors. Air chutes run up through the ocean on ladders, to be swapped later for blue glass "so that they don't stand out."
JJBonsig shows up partway through, having come by the nether: "I found my way to your island without dying." JJBonsig asks if Basket needs anything, and carrots and glass end up on the list.
Moving two villagers
The villager room for the new cell is 8 by 8 with a small farm and an infinite spring. Digging a tunnel to it by the F3 coordinates, Basket breaks into a cave with a witch ("we don't want to deal with that") and grabs lapis, iron and gold on the way past.
The tricky part is getting villagers there. Basket boxes off two of them up top and floats them down the ladder shaft with water, then nudges them along the tunnel. "Come on. You can do it." Once they land, they're happy almost at once, and a baby turns up a few minutes later.
The rest of the session is water: flows along each floor, with a block placed and broken in each corner so it doesn't turn into one big infinite spring, and signs to steer the golems into the drop. The old cell, though, still has about ten villagers of the sixteen it needs, and no babies. The stream ends there.
The fixes
A short clip added later shows the farm running. Most of the island's surface is iron blocks now, the air chutes out in the water are blue glass, and Basket says the golems "keep on dying" in the kill chamber, which somehow also ended up with two slimes in it. Basket had been AFK there for a few days.
Then come two corrections for anyone copying the design. The cells have to be four blocks high, not three: "If you make them three high, they don't spawn any golems." And the open space left for a torch next to a door stopped that door from counting, which kept the village stuck at nine villagers. Once Basket filled it in, "they immediately popped out a baby and everything was fine."
The video ends on the credits, with no gameplay after them.