Quick answer: In Minecraft Java Edition 26.4 Snapshot 6, a Sulfur Cube can become a Cold Sulfur Cube when it absorbs a Blue Ice block. The Cold archetype behaves like the Fast Sliding archetype, but it floats and creates a disk of Frosted Ice beneath itself as it moves over water. The mechanic has two important conditions: the cube must begin moving while it is on the ground, and there must be air above the water blocks where Frosted Ice should form. It is a new snapshot feature, so do not assume it works the same way in every stable version or Bedrock build.
Version note — October 28, 2026: This guide is based on Mojang’s Java Edition 26.4 Snapshot 6 and Bedrock Preview 26.70.22 changelogs. Both are work-in-progress testing versions, and the exact behavior may change before release.
What is the Cold Sulfur Cube?
The Cold Sulfur Cube is a new archetype in the Sulfur Cube family. Think of it as a slippery, buoyant mob that can leave a temporary-looking frozen route across water: rather than simply sliding around, it can place Frosted Ice beneath itself while moving under the right conditions. Mojang compares the effect to the Frost Walker enchantment, but the cube has its own movement rules.
The important word is archetype. You are not crafting a new mob from blocks, and the official notes do not describe a separate taming system or a permanent pet command. Instead, a Sulfur Cube changes to the Cold archetype when it absorbs Blue Ice. Calling it a “Frost Walker pet” is a useful shorthand for the behavior, not an official pet mechanic.
How to turn a Sulfur Cube cold with one Blue Ice block
- Start with a Sulfur Cube. Find or use a Sulfur Cube in the test world for your current Java snapshot. The feature is documented in the 26.4 development cycle, so the exact way to encounter the mob depends on the version and world setup.
- Get one Blue Ice block. Bring the block to the cube in a safe, controlled area. Blue Ice is the item that triggers the Cold archetype in the official changelog.
- Let the cube absorb the Blue Ice. The notes describe the Cold archetype as being used when the Sulfur Cube absorbs a Blue Ice block. They do not say you must build a crafting recipe or feed it an ordinary Ice block instead.
- Move it toward a suitable water area. Set up a test pool with open air above the water and solid ground for the cube to start from. This makes it easier to tell whether the mechanic is working.
- Observe the ice trail. When it starts moving while on the ground and passes over eligible water, look for Frosted Ice forming below it.
The two conditions that make or break the ice trail
1. The cube must begin moving while grounded
Java Snapshot 6 specifically says the Cold Sulfur Cube only places Frosted Ice if it starts its movement while on the ground. That means dropping a cube directly into a pool and expecting an ice path is not a reliable test. Let it begin moving on a solid surface, then guide or position it so its movement carries it across water.
If the cube floats in place, falls into the pool, or never starts moving from the ground, the effect may not trigger as you expect. Reset the test rather than assuming the Blue Ice interaction failed. The movement condition is part of the mechanic, not an optional optimization.
2. Air must be above the water
The official Java changelog also requires air blocks above the water block for Frosted Ice placement. A roof, low ceiling, or solid block occupying the space directly above the water can prevent the expected result. For the cleanest test, use an open-top pool and avoid covering the water with a roof while troubleshooting.
Build a simple test course before trying a large ice bridge
You do not need a giant lake or a complicated redstone contraption to learn how the feature behaves. Make a small test area with a dry starting platform, a shallow water channel, and clear space above the water. Keep the edges safe so the cube cannot disappear into a deep cave or become difficult to retrieve. Use a separate experimental world if you are testing a snapshot.
- Starting pad: a flat, solid surface where the cube can begin moving.
- Water channel: a short stretch of water with open air directly above it.
- Clear exit: a dry landing area beyond the water so you can observe whether the cube continues moving.
- Safe boundaries: walls or barriers placed far enough away that they do not block the air above the water.
- Observation point: stand off the route so you can see the ice appear without stepping into the mob’s path.
Change one variable at a time. First test the cube on open water, then add a roof to see whether overhead blocks affect placement. Next, compare a cube that starts on solid ground with one that is dropped into the water. This approach helps distinguish a setup issue from a genuine bug in the snapshot.
What Frosted Ice does—and what you should not assume
Frosted Ice is the block effect associated with Frost Walker-style movement. It is not the same thing as placing Blue Ice, Packed Ice, or ordinary Ice as permanent building material. The official snapshot notes describe a disk of Frosted Ice being created below the moving Cold Sulfur Cube; they do not promise that the cube will pave every water surface indefinitely or produce a perfectly continuous highway in every layout.
Do not build a permanent base design around untested assumptions about how long the ice lasts, how wide the disk is, or how the cube behaves in every enclosure. The reliable published facts are the Blue Ice trigger, the Cold archetype’s buoyant behavior, the ground-start requirement, and the need for air above the water. Test the exact build you plan to use before committing rare resources.
Does this work in Bedrock Edition too?
Mojang’s Bedrock Preview 26.70.22 changelog also introduces the Cold Sulfur Cube. It says Sulfur Cubes with the Cold archetype create Frosted Ice when moving over water source blocks, similar to the Frost Walker effect, and obtain the archetype by equipping a Sulfur Cube with a Blue Ice block. This confirms the core idea is present in that Bedrock Preview, but Java’s more specific air-space and grounded-start wording comes from the Java Snapshot 6 notes.
Keep the distinction clear: Java Snapshot 6 and Bedrock Preview 26.70.22 are separate test builds. Do not assume the timing, edge cases, or exact behavior will match one-to-one. If you play Bedrock, check the changelog for your own Preview or Beta build and run the same small open-water test.
Official references: Minecraft Java Edition 26.4 Snapshot 6 and Minecraft Beta & Preview 26.70.22. Mojang warns that these development versions can be unstable and may not represent final release quality.
Troubleshooting: why is my Sulfur Cube not making Frosted Ice?
- It never absorbed Blue Ice. Confirm that the cube has actually changed to the Cold archetype; the feature is triggered by the Blue Ice interaction, not by standing near a block.
- It started in the water. Java Snapshot 6 says Frosted Ice placement only occurs when the cube starts moving while on the ground. Reset the test with a grounded starting point.
- The water is covered. Remove blocks above the water and test with open air directly above the target blocks.
- The cube is not moving over the water. The effect is movement-based. A cube floating motionless in a pool is not the same test as one sliding from land across the surface.
- You are using a different version. Compare your exact Java snapshot or Bedrock Preview against its own changelog before concluding the feature is broken.
- The world is unstable or modified. Test in a fresh, unmodded world with backups. Experimental builds, data packs, and add-ons can change entity behavior.
Frequently asked questions
How many Blue Ice blocks do I need?
The official Java Snapshot 6 notes identify Blue Ice as the trigger for the Cold archetype but do not specify a full cost or consumption rule in the short description. The title’s “one block” is a practical test starting point; verify the exact interaction in your build rather than assuming every version has identical resource behavior.
Can I craft a Cold Sulfur Cube?
No crafting recipe is described in the official notes. The documented method is to have a Sulfur Cube absorb a Blue Ice block, which changes its archetype.
Does the Cold Sulfur Cube freeze water while standing still?
The Java Snapshot 6 notes say it places Frosted Ice when it moves and only if its movement starts while on the ground. Do not expect a stationary cube to create an ice trail.
Why does a roof stop the ice from appearing?
Java Snapshot 6 requires air blocks above the water for Frosted Ice placement. A roof or other block above the target water may violate that condition.
Is the Cold Sulfur Cube officially a pet?
Not in the sense of a confirmed tameable pet system. “Frost Walker pet” is a catchy description for its behavior; the official feature is a new Sulfur Cube archetype activated by Blue Ice.
Can I use it in my main survival world now?
Only if your game version actually includes the feature, and it is safer to back up the world first. Mojang explicitly warns that snapshots and previews can be unstable and may not reflect the final version.
Bottom line: Blue Ice is the key to the Cold Sulfur Cube, but the ice trail depends on how you test it. Let the cube start moving on solid ground, give the water open air above it, and then watch for Frosted Ice beneath its path. The mechanic is confirmed in Java Snapshot 6 and Bedrock Preview 26.70.22, but it remains part of development builds—so test it in a backup world before planning a permanent survival project around it.