About This Guide

A dedicated creeper-only mob farm that produces gunpowder automatically. Uses dark spawning platforms with carpet to block spiders and water channels to push creepers into a kill chamber. Essential for firework rockets and TNT. This intermediate mob grinder build works in Minecraft Java Edition, version 1.20+ and above. Budget around 35-45 minutes for construction — have all materials in your inventory before you begin.

Difficulty: Intermediate

The Intermediate rating reflects either multi-layered construction, a larger footprint that demands planning ahead, or simple redstone circuits. You should be comfortable with basic survival mechanics and resource gathering before starting. Budget extra time for iteration — not everything lines up perfectly the first try.

Materials You’ll Need

Material	Quantity
Cobblestone	128
Dark Block (any solid)	96
Carpet (any)	24
Water Bucket	4
Hopper	1
Chest	2
Slab (any)	4
Cat (tamed)	4
Torch	32

Total distinct materials: 9. Gather everything listed above before you start — mid-build supply runs break your momentum.

Step-by-Step Instructions

Step 1: Build the Collection Base

Start at the bottom. Place a chest and connect a hopper feeding into it. Above the hopper, place a slab at half-height. This is where creepers land and die from fall damage.

💡 Tip: Build this at the bottom of a tall structure. You need at least 24 blocks of fall height to kill creepers.

Step 2: Add Water Push Channels

Above the kill zone, create a water layer in a 3x3 area with a center hole. Water should flow from all edges toward the center drop point. Creepers that fall from above get pushed into the hole.

💡 Tip: Sign blocks can hold water back at edges. Use them to control exactly where water flows.

Step 3: Build the Spawning Platform

Above the water layer, build a 7x7 dark spawning platform. Leave the center 3x3 area open (mobs fall through here into the water). Use any dark solid block — the darker the better for spawn rates.

💡 Tip: Mobs spawn in light level 0. Make the platform completely dark — no torches, no skylights.

Step 4: Add Carpet and Walls

Place carpet on the inner ring of the platform (one block from walls). This blocks spiders from spawning — they need a 2x2 space but carpet prevents it. Build 3-high cobblestone walls around the perimeter.

💡 Tip: Carpet is the secret to a creeper-only farm. Spiders need 2x2 floor space and carpet breaks that requirement.

Step 5: Build Upper Spawning Layer

Stack a second dark spawning platform above the first, inside the walls. More layers = more spawning space = more gunpowder per hour. Place tamed cats on the platforms to scare creepers toward the edges.

💡 Tip: Cats scare creepers within 6 blocks. Place them in the center so creepers flee toward the drop edges.

Step 6: Activate the Farm

Light up ALL caves and surface areas within 128 blocks to maximize spawns inside your farm. AFK at the collection point. Creepers spawn, get scared by cats, walk off edges, fall into water, get pushed to the drop, and die from fall damage. Gunpowder appears in your chest.

💡 Tip: Light up surrounding areas to force all mob spawns into your farm. This dramatically increases rates.

Tips & Tricks

Build this at the bottom of a tall structure. You need at least 24 blocks of fall height to kill creepers.
Sign blocks can hold water back at edges. Use them to control exactly where water flows.
Mobs spawn in light level 0. Make the platform completely dark — no torches, no skylights.
Carpet is the secret to a creeper-only farm. Spiders need 2x2 floor space and carpet breaks that requirement.
Cats scare creepers within 6 blocks. Place them in the center so creepers flee toward the drop edges.
Light up surrounding areas to force all mob spawns into your farm. This dramatically increases rates.
Light up all caves within 128 blocks of the farm to maximize mob spawning rates inside your structure.
Take a screenshot of the finished build from multiple angles — you’ll thank yourself when you want to recreate it in a future world.
Label a nearby chest with a sign so you can dump leftover materials immediately and keep your inventory clean.