Day-1 iron farm (iron armour on your first day)

381 iron an hour · 568 blocks · 0.67 an hour per block · 16 iron to build · two bed-plate farms side by side, dug 8 deep

Villagers scared by a zombie summon iron golems; the farm kills them and collects their iron in a chest.

To build it: 16 iron in hand, 2 buckets of lava and 6 villagers from the village. Starts by itself the first night. Restarts by itself when you come back after days away.

67 minutes from the first block to a full set of iron armour, then 381 iron an hour · needs no redstone

381 iron an hourIron farm3D view loading (or not available in this browser)

Try it

Press play to watch it work: the villagers sleep at night and panic at the zombie by day, golems spawn and die, and the hoppers carry their iron to the chest; the top right counts the game's time, the golems and the iron. The magenta floor is where a golem can spawn, seen through the blocks (Spawn spots hides it). The chest tagged OUT collects the first copy's iron; every copy has its own chest under its last hopper. In the game, build it and wait near it.

How this design does it: 2 module(s); each: 2 scared and 0 blind villagers in 1-cell pods, a zombie in a boat, the bed plate; golems spawn on a 6x6 pad 7 below the beds and fall through its dry hole into a pit corner 13 below the beds under one lava source.

Build it

Download .litematic Download the design as text

The .litematic opens in Litematica (Minecraft 26.3): every block of the design in one region. The text file is the same build written as plain text, block by block.

Pour in the water and the lava (2 bucketfuls) where the view shows them.

Blocks used: chest cobblestone cobblestone slab hopper lava oak boat oak button oak fence gate oak pressure plate oak trapdoor oak wall sign red bed villager wall torch water

What it is made of

Each part of this farm, what it takes to build, and the version of it this farm uses: follow a part to see its other versions side by side.

part	this farm's	blocks placed	blocks dug	build time
Villager cage	its own · other versions	28	46	30 min
Sleep trigger	its own · other versions	2	0	20 s
Golem spawn area	its own · other versions	80	0	14 min
Golem drop	its own · other versions	0	242	4 min
Kill chamber	its own · other versions	14	144	7 min
Collection	its own · other versions	4	0	6 min
At the farm's spot	429 cobblestone slabs capping stray golem spots and 10 cobblestone seals	443	176	counted above
The whole farm		571	608	1 h 01 min

Details: how it works, measurements and properties

In depth

villagers scared by a zombie summon iron golems; the farm kills them and collects their iron in a chest

How to try it

Press play to run the farm. The villagers sleep in their beds at night and panic at the zombie by day, golems spawn, fall and die in the lava, and the hoppers carry their iron and poppies to the chest. The chest tagged OUT collects the first copy's iron; every copy has its own chest under its last hopper. The top right shows the game's time, the golems so far and the iron in the chest; the speed menu plays it faster or slower. Drag to look around, pinch or scroll to zoom.

Measurements

On Hard, through rain, thunder and lightning.

metric	value	what it means
iron per hour per block	0.67	iron ingots an hour for each block you place
iron per hour	381	iron ingots an hour
golems per hour	95.9	iron golems an hour
seconds per golem	37.5	the time between two golems
modules	2	groups of villagers that each summon golems on their own
iron per hour per module	190	iron ingots an hour for each group of villagers
kill	15.45 s	how long a golem lives before the farm kills it, at the longest
kill tail	the longest 24.35 s: no golem outlived 1 min in 16,190 golems (95% bound 0.02% a golem)
golems at the zombie	0 of 16,190 golems targeted the farm's zombie
neighbour sightings	16,171 of 16,190 golems sensed by another group (67,804 sensings, 4.19 a golem)
lips	none (no golem stands dry beside a current)
restarts after a missed night	yes	whether it starts again by itself after a night its villagers could not sleep (rain at dusk, a storm, you away)
restarts after days away	yes (unloaded or not ticking	whether it starts again by itself when you come back after days away
back	by day or at night: the first golem 0.0-0.1 h after the return)
rain	clear day 424 iron/h; rain day 402 iron/h; thunder day 385 iron/h	iron an hour on a clear day, a rainy day and a stormy day
lightning	about 0.0 iron lost per thunderstorm; a villager turned into a witch about every 11,390 game days; the zombie's boat broken never; a fire that can reach the farm (its flammable blocks or mobs or drop path) never; site note: a fire on the site that cannot reach the farm about every 7.8 game days; AFK spot struck: about every 1,627 game days (a 7 x 7 opaque non-flammable roof over the player's column with its block 4 above the player's feet prevents it: a single block over its column does not); no natural flammable block lies on a fire's way to the farm; a skeleton trap horse on the farm about every 17,219 game days (every 246 game days of thunder; a lightning rod topping its column within 128 blocks prevents it); a skeleton trap horse that triggers (within 10 blocks of the AFK spot) about every 3,802 game days (a lightning rod within 128 blocks topping its column takes the bolts: none then); the farm breaks in about 11,390 game days (a villager made a witch first); thunderstorms 1.4% of the time (5 min 10.55 s each on average)	what thunderstorms cost: the iron a strike burns, and how often a strike turns a villager into a witch, breaks the zombie's boat or starts a fire
thunder loss	1.2	iron lost for each hour of thunder
sunburn	never (the zombie never sees the sky)	whether the zombie can burn in daylight
fire	never	whether the lava can set the farm on fire
bill	16 iron, 0 quartz, 6 villagers, 6 beds, 2 zombies	what it costs in survival: iron (hoppers, the bucket and every tool you need), quartz, villagers, beds
payback	2 min	how long the farm takes to make back the iron it cost
build time	61 min at day-1 prices (571 placed with 429 cobblestone slabs capping stray golem spots and 10 cobblestone seals, 608 dug (the stair down to the chest: 69 dug, 4 placed), 1 lava trips, 6 villagers moved; the most: 6 villager_moved 1,080 s, 608 dig 608 s, 571 place 571 s, 2 zombie 360 s, 2 hopper 308 s, 435 cobblestone_slab 218 s, 1 lava_trip 120 s, 1 extra_bucket 90 s)	about how long the build takes: placing and digging its blocks, fetching the lava, moving the villagers in
time to an iron kit	67 min at the cheapest spot (from dawn of day 1 until the chest holds 24 iron; runs 65-72 min; 66-69 min over the 12 nearest spots)	about how long from starting the build to a full set of iron armour (24 iron), its own iron counted
build minutes	60.9
t kit minutes	67.4
collecting	12 s per trip to the chest (2 x its depth, 24 layers
at	the access's speed)
iron per hour sleeping	426
volume per module	3,192
entities alive	10.5
entities peak	14
iron	burnt per golem 0.01 (0.3% of the loot; 1 golem in 207)
tools	bucket 3 + extra buckets 3	the tools you need and the iron each one costs: a bucket for lava and water, shears for leaves, an iron pickaxe for redstone dust
lava sources	2	lava source blocks to bring: one bucket trip each
materials	day 1	the stage of the game its materials need: day 1, the Nether (quartz, slime, magma...) or the End
chunk columns	2	how many 16 x 16 chunk columns it covers
storage	7.9 h (64 slots; 101 poppies/h)	how long its chests and hoppers hold the iron and poppies before they fill
hoppers per 1000 iron/h	5.0	hoppers for each 1000 iron an hour: each hopper costs the server a little work every tick
spot	village-edge at -352 64 246 (the cheapest of the 12 nearest valid spots)
exposures	in village-edge (-352,246): C4 presence village villager 1,095 cells
village	golem 840; C8 creepers creeper 126 cells
creeper	143; C10 flyers phantom 1 cells
build minutes	flat none (no spot for a 21x16 footprint 23 deep in plains)
villagers	left 2
hostile	break days exposed: C8 creepers
redstone dust	none	the redstone dust its blocks take to craft (a repeater or a comparator 3, an observer 2, a piston 1...): redstone ore needs an iron pickaxe to mine

Notes from its designer

2 module(s); each: 2 scared and 0 blind villagers in 1-cell pods, a zombie in a boat, the bed plate; golems spawn on a 6x6 pad 7 below the beds and fall through its dry hole into a pit corner 13 below the beds under one lava source.

Properties

Study	Mob farms
Kind	Day-1 iron farm (iron armour on your first day)
Blocks placed	568
Box	21×19×16 (6384 blocks of space)
Inputs / outputs	no input / OUT
Flags	variation
Design file	`bed-plate-two-clusters`

The design file

on GitHub

Design file (365 lines)

# Iron farm: 381 iron an hour · 568 blocks · 0.67 an hour per block · 16 iron to build · two bed-plate farms side by side, dug 8 deep
# https://vjeux.github.io/redstonepedia/farms/iron/bed-plate-two-clusters.html
# CIRCUIT: seconds per golem 35.8
name: plate-s2b0-pad6f7x0-pit13-n2row14-dug8
afk: 2.5 9 4.5
circuit: mob-farm iron_ingot
ground: 8
how: golems burn in a corner of their pit
restart: yes
terrain: cells
port output: 0 -15 3
entity: minecraft:villager 0.5 0.5625 0.5
entity: minecraft:villager 2.5 0.5625 0.5
entity: minecraft:oak_boat 2.5 0.5 -6.8 {Passengers:[{id:"minecraft:zombie"}]}
entity: minecraft:villager 3.5 2 -5.5
entity: minecraft:villager 14.5 0.5625 0.5
entity: minecraft:villager 16.5 0.5625 0.5
entity: minecraft:oak_boat 16.5 0.5 -6.8 {Passengers:[{id:"minecraft:zombie"}]}
entity: minecraft:villager 17.5 2 -5.5
origin: -1 0 -8
palette:
  A minecraft:air
  B minecraft:cobblestone_slab[type=bottom,waterlogged=false]
  C minecraft:chest[facing=north,type=single,waterlogged=false]
  D minecraft:cobblestone_slab[type=top,waterlogged=false]
  E minecraft:oak_fence_gate[facing=north,in_wall=false,open=true,powered=false]
  F minecraft:oak_pressure_plate[powered=false]
  G minecraft:oak_trapdoor[facing=south,half=bottom,open=true,powered=false,waterlogged=false]
  H minecraft:hopper[enabled=true,facing=down]
  I minecraft:oak_trapdoor[facing=west,half=top,open=false,powered=false,waterlogged=false]
  J minecraft:oak_wall_sign[facing=east,waterlogged=false]
  K minecraft:oak_wall_sign[facing=south,waterlogged=false]
  L minecraft:lava[level=0]
  M minecraft:red_bed[facing=west,occupied=false,part=foot]
  N minecraft:red_bed[facing=west,occupied=false,part=head]
  O minecraft:oak_button[face=wall,facing=east,powered=false]
  R minecraft:red_bed[facing=north,occupied=false,part=foot]
  W minecraft:wall_torch[facing=east]
  c minecraft:cobblestone
  o minecraft:oak_button[face=wall,facing=south,powered=false]
  r minecraft:red_bed[facing=north,occupied=false,part=head]
  w minecraft:water[level=0]
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layer -12:
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layer -10:
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layer -7:
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layer -6:
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layer -5:
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layer -4:
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layer -3:
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layer -2:
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layer -1:
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layer 0:
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layer 1:
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layer 2:
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layer 3:
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